/usr/bin/java -Xmx16000000000 -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-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:42:02,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:42:02,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:42:02,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:42:02,323 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 [2021-02-19 17:42:02,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:42:02,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:42:02,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:42:02,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:42:02,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:42:02,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:42:02,348 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:42:02,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:42:02,348 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:42:02,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:42:02,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:42:02,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:42:02,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:42:02,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:42:02,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:42:02,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:42:02,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:42:02,351 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:42:02,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:42:02,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:42:02,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:42:02,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:42:02,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:42:02,688 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:42:02,689 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:42:02,690 INFO L432 ainManager$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 [2021-02-19 17:42:02,690 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-02-19 17:42:02,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:42:02,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:42:02,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:42:02,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:42:02,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:42:02,728 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,734 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:42:02,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:42:02,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:42:02,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:42:02,754 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,754 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,764 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,764 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,767 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,769 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,770 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 19.02 05:42:02" (1/1) ... [2021-02-19 17:42:02,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:42:02,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:42:02,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:42:02,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:42:02,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:02" (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 [2021-02-19 17:42:02,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:42:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:42:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:42:02,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:42:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:42:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:42:02,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:42:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:42:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:42:02,835 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:42:03,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:42:03,166 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 17:42:03,167 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-02-19 17:42:03,167 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-02-19 17:42:03,168 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:42:03 BoogieIcfgContainer [2021-02-19 17:42:03,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:42:03,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:42:03,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:42:03,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:42:03,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:02" (1/2) ... [2021-02-19 17:42:03,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74704a2c and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:42:03, skipping insertion in model container [2021-02-19 17:42:03,178 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 19.02 05:42:03" (2/2) ... [2021-02-19 17:42:03,179 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-02-19 17:42:03,183 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:42:03,183 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:42:03,188 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:42:03,189 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:42:03,237 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 17:42:03,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 17:42:03,279 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:42:03,280 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:42:03,280 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:42:03,280 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:42:03,281 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:42:03,281 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:42:03,281 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:42:03,281 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:42:03,293 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-02-19 17:42:03,301 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) [2021-02-19 17:42:03,303 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) [2021-02-19 17:42:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-19 17:42:03,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:03,308 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:03,308 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -381977337, now seen corresponding path program 1 times [2021-02-19 17:42:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:03,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595067592] [2021-02-19 17:42:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:03,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595067592] [2021-02-19 17:42:03,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:03,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:42:03,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282970230] [2021-02-19 17:42:03,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:42:03,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:42:03,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:42:03,562 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) [2021-02-19 17:42:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:03,639 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2021-02-19 17:42:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:42:03,642 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 [2021-02-19 17:42:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:03,649 INFO L225 Difference]: With dead ends: 40 [2021-02-19 17:42:03,649 INFO L226 Difference]: Without dead ends: 37 [2021-02-19 17:42:03,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-19 17:42:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-02-19 17:42:03,674 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) [2021-02-19 17:42:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-02-19 17:42:03,676 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2021-02-19 17:42:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:03,676 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-02-19 17:42:03,677 INFO L481 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) [2021-02-19 17:42:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-02-19 17:42:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-19 17:42:03,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:03,677 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:03,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:42:03,678 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash -481455797, now seen corresponding path program 2 times [2021-02-19 17:42:03,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:03,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604785403] [2021-02-19 17:42:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:03,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604785403] [2021-02-19 17:42:03,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:03,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:42:03,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496360103] [2021-02-19 17:42:03,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:42:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:42:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:42:03,724 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) [2021-02-19 17:42:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:03,783 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-02-19 17:42:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:42:03,784 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 [2021-02-19 17:42:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:03,787 INFO L225 Difference]: With dead ends: 46 [2021-02-19 17:42:03,787 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 17:42:03,787 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 17:42:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-02-19 17:42:03,798 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) [2021-02-19 17:42:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-02-19 17:42:03,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2021-02-19 17:42:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:03,800 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-02-19 17:42:03,801 INFO L481 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) [2021-02-19 17:42:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-02-19 17:42:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:03,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:03,802 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:03,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:42:03,803 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1042522285, now seen corresponding path program 1 times [2021-02-19 17:42:03,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:03,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782883565] [2021-02-19 17:42:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:03,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782883565] [2021-02-19 17:42:03,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:03,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249561672] [2021-02-19 17:42:03,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:03,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:03,872 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) [2021-02-19 17:42:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:03,920 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2021-02-19 17:42:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:03,921 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 [2021-02-19 17:42:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:03,922 INFO L225 Difference]: With dead ends: 41 [2021-02-19 17:42:03,922 INFO L226 Difference]: Without dead ends: 36 [2021-02-19 17:42:03,922 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-19 17:42:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-02-19 17:42:03,925 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) [2021-02-19 17:42:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2021-02-19 17:42:03,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2021-02-19 17:42:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:03,926 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2021-02-19 17:42:03,927 INFO L481 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) [2021-02-19 17:42:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2021-02-19 17:42:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:03,927 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:03,927 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:03,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:42:03,928 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash -707752677, now seen corresponding path program 1 times [2021-02-19 17:42:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691644052] [2021-02-19 17:42:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691644052] [2021-02-19 17:42:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886582764] [2021-02-19 17:42:03,983 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 [2021-02-19 17:42:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:42:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:04,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:04,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:42:04,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675018309] [2021-02-19 17:42:04,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:42:04,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:42:04,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:42:04,170 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) [2021-02-19 17:42:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:04,233 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2021-02-19 17:42:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:04,234 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 [2021-02-19 17:42:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:04,237 INFO L225 Difference]: With dead ends: 39 [2021-02-19 17:42:04,237 INFO L226 Difference]: Without dead ends: 39 [2021-02-19 17:42:04,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-19 17:42:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-02-19 17:42:04,246 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) [2021-02-19 17:42:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2021-02-19 17:42:04,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2021-02-19 17:42:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:04,247 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2021-02-19 17:42:04,247 INFO L481 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) [2021-02-19 17:42:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2021-02-19 17:42:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:04,247 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:04,247 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:04,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:04,448 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -742242437, now seen corresponding path program 2 times [2021-02-19 17:42:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:04,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551990111] [2021-02-19 17:42:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:04,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551990111] [2021-02-19 17:42:04,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710284229] [2021-02-19 17:42:04,495 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 [2021-02-19 17:42:04,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:42:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:04,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:04,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:42:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505818887] [2021-02-19 17:42:04,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:42:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:42:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:04,634 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) [2021-02-19 17:42:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:04,685 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2021-02-19 17:42:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:04,686 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 [2021-02-19 17:42:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:04,688 INFO L225 Difference]: With dead ends: 52 [2021-02-19 17:42:04,688 INFO L226 Difference]: Without dead ends: 52 [2021-02-19 17:42:04,689 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-19 17:42:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-02-19 17:42:04,696 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) [2021-02-19 17:42:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2021-02-19 17:42:04,697 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2021-02-19 17:42:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:04,698 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2021-02-19 17:42:04,698 INFO L481 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) [2021-02-19 17:42:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2021-02-19 17:42:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:04,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:04,699 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:04,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:04,900 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash 59373791, now seen corresponding path program 2 times [2021-02-19 17:42:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:04,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435934869] [2021-02-19 17:42:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:04,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435934869] [2021-02-19 17:42:04,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:04,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:04,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713041690] [2021-02-19 17:42:04,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:04,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:04,936 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) [2021-02-19 17:42:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:04,972 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-02-19 17:42:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:04,973 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 [2021-02-19 17:42:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:04,974 INFO L225 Difference]: With dead ends: 42 [2021-02-19 17:42:04,974 INFO L226 Difference]: Without dead ends: 41 [2021-02-19 17:42:04,974 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-19 17:42:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-02-19 17:42:04,977 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) [2021-02-19 17:42:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-02-19 17:42:04,977 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2021-02-19 17:42:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:04,977 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-02-19 17:42:04,978 INFO L481 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) [2021-02-19 17:42:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-02-19 17:42:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:04,978 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:04,978 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:04,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:42:04,979 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:04,979 INFO L82 PathProgramCache]: Analyzing trace with hash 865278749, now seen corresponding path program 3 times [2021-02-19 17:42:04,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:04,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189891640] [2021-02-19 17:42:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189891640] [2021-02-19 17:42:05,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:05,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:05,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086750491] [2021-02-19 17:42:05,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:05,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:05,030 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) [2021-02-19 17:42:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:05,086 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-02-19 17:42:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:05,089 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 [2021-02-19 17:42:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:05,089 INFO L225 Difference]: With dead ends: 46 [2021-02-19 17:42:05,089 INFO L226 Difference]: Without dead ends: 44 [2021-02-19 17:42:05,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-19 17:42:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-02-19 17:42:05,092 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) [2021-02-19 17:42:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-02-19 17:42:05,093 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2021-02-19 17:42:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:05,093 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-02-19 17:42:05,093 INFO L481 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) [2021-02-19 17:42:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-02-19 17:42:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:05,093 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:05,093 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:05,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:42:05,094 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1777717497, now seen corresponding path program 3 times [2021-02-19 17:42:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:05,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903675330] [2021-02-19 17:42:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903675330] [2021-02-19 17:42:05,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:05,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:05,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667897977] [2021-02-19 17:42:05,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:05,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:05,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:05,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:05,143 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) [2021-02-19 17:42:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:05,194 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2021-02-19 17:42:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:05,194 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 [2021-02-19 17:42:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:05,194 INFO L225 Difference]: With dead ends: 38 [2021-02-19 17:42:05,194 INFO L226 Difference]: Without dead ends: 38 [2021-02-19 17:42:05,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-19 17:42:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-02-19 17:42:05,197 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) [2021-02-19 17:42:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-02-19 17:42:05,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2021-02-19 17:42:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:05,197 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-02-19 17:42:05,198 INFO L481 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) [2021-02-19 17:42:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-02-19 17:42:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:05,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:05,198 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:05,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:42:05,199 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash 617529731, now seen corresponding path program 4 times [2021-02-19 17:42:05,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:05,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599262600] [2021-02-19 17:42:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599262600] [2021-02-19 17:42:05,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022193530] [2021-02-19 17:42:05,230 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 [2021-02-19 17:42:05,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:42:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:05,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:42:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853267848] [2021-02-19 17:42:05,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:42:05,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:42:05,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:42:05,360 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) [2021-02-19 17:42:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:05,427 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-02-19 17:42:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:05,446 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 [2021-02-19 17:42:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:05,447 INFO L225 Difference]: With dead ends: 42 [2021-02-19 17:42:05,447 INFO L226 Difference]: Without dead ends: 42 [2021-02-19 17:42:05,447 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-19 17:42:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-02-19 17:42:05,449 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) [2021-02-19 17:42:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2021-02-19 17:42:05,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2021-02-19 17:42:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:05,450 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2021-02-19 17:42:05,450 INFO L481 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) [2021-02-19 17:42:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2021-02-19 17:42:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:05,450 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:05,450 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:05,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:05,651 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2019920037, now seen corresponding path program 4 times [2021-02-19 17:42:05,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:05,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785407620] [2021-02-19 17:42:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785407620] [2021-02-19 17:42:05,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:05,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:05,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881402647] [2021-02-19 17:42:05,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:05,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:05,696 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) [2021-02-19 17:42:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:05,758 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2021-02-19 17:42:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:05,758 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 [2021-02-19 17:42:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:05,758 INFO L225 Difference]: With dead ends: 41 [2021-02-19 17:42:05,758 INFO L226 Difference]: Without dead ends: 39 [2021-02-19 17:42:05,759 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-19 17:42:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-02-19 17:42:05,761 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) [2021-02-19 17:42:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-02-19 17:42:05,761 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-02-19 17:42:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:05,761 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-02-19 17:42:05,761 INFO L481 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) [2021-02-19 17:42:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-02-19 17:42:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:05,762 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:05,762 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:05,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:42:05,762 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:05,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:05,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1491865057, now seen corresponding path program 5 times [2021-02-19 17:42:05,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:05,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481163383] [2021-02-19 17:42:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481163383] [2021-02-19 17:42:05,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37732322] [2021-02-19 17:42:05,803 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 [2021-02-19 17:42:05,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:05,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:42:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:05,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:05,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:42:05,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551266373] [2021-02-19 17:42:05,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:42:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:42:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:05,912 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) [2021-02-19 17:42:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:05,951 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-02-19 17:42:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:05,951 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 [2021-02-19 17:42:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:05,952 INFO L225 Difference]: With dead ends: 44 [2021-02-19 17:42:05,952 INFO L226 Difference]: Without dead ends: 44 [2021-02-19 17:42:05,952 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-19 17:42:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-02-19 17:42:05,954 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) [2021-02-19 17:42:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-02-19 17:42:05,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-02-19 17:42:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:05,955 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-02-19 17:42:05,955 INFO L481 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) [2021-02-19 17:42:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-02-19 17:42:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:05,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:05,955 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:06,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:06,177 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:06,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2001486011, now seen corresponding path program 5 times [2021-02-19 17:42:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:06,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265666804] [2021-02-19 17:42:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:06,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265666804] [2021-02-19 17:42:06,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:06,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:06,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870915624] [2021-02-19 17:42:06,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:06,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:06,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:06,210 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) [2021-02-19 17:42:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:06,257 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2021-02-19 17:42:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:06,258 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 [2021-02-19 17:42:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:06,259 INFO L225 Difference]: With dead ends: 41 [2021-02-19 17:42:06,259 INFO L226 Difference]: Without dead ends: 40 [2021-02-19 17:42:06,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-19 17:42:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-02-19 17:42:06,264 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) [2021-02-19 17:42:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2021-02-19 17:42:06,266 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2021-02-19 17:42:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:06,266 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2021-02-19 17:42:06,267 INFO L481 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) [2021-02-19 17:42:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2021-02-19 17:42:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:06,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:06,267 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:06,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:42:06,267 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1195581053, now seen corresponding path program 6 times [2021-02-19 17:42:06,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:06,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571167881] [2021-02-19 17:42:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:06,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571167881] [2021-02-19 17:42:06,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:06,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:06,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794583161] [2021-02-19 17:42:06,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:06,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:06,297 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) [2021-02-19 17:42:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:06,353 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2021-02-19 17:42:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:06,353 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 [2021-02-19 17:42:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:06,354 INFO L225 Difference]: With dead ends: 35 [2021-02-19 17:42:06,354 INFO L226 Difference]: Without dead ends: 33 [2021-02-19 17:42:06,355 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-19 17:42:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-02-19 17:42:06,363 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) [2021-02-19 17:42:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2021-02-19 17:42:06,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2021-02-19 17:42:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:06,363 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2021-02-19 17:42:06,363 INFO L481 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) [2021-02-19 17:42:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2021-02-19 17:42:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:42:06,364 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:06,364 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:06,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 17:42:06,364 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:06,365 INFO L82 PathProgramCache]: Analyzing trace with hash -283142305, now seen corresponding path program 6 times [2021-02-19 17:42:06,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:06,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575097266] [2021-02-19 17:42:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:06,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575097266] [2021-02-19 17:42:06,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:06,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:06,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414780105] [2021-02-19 17:42:06,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:06,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:06,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:06,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:06,396 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) [2021-02-19 17:42:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:06,449 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2021-02-19 17:42:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:06,449 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 [2021-02-19 17:42:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:06,450 INFO L225 Difference]: With dead ends: 32 [2021-02-19 17:42:06,450 INFO L226 Difference]: Without dead ends: 32 [2021-02-19 17:42:06,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-19 17:42:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-02-19 17:42:06,452 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) [2021-02-19 17:42:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-02-19 17:42:06,452 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-02-19 17:42:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:06,452 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-02-19 17:42:06,452 INFO L481 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) [2021-02-19 17:42:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-02-19 17:42:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:42:06,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:06,453 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:06,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 17:42:06,453 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash -466578663, now seen corresponding path program 1 times [2021-02-19 17:42:06,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:06,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332661129] [2021-02-19 17:42:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:06,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332661129] [2021-02-19 17:42:06,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911572443] [2021-02-19 17:42:06,804 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 [2021-02-19 17:42:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:42:06,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:07,218 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 27 treesize of output 21 [2021-02-19 17:42:07,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:07,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:07,225 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 25 treesize of output 19 [2021-02-19 17:42:07,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:07,247 INFO L628 ElimStorePlain]: treesize reduction 73, result has 13.1 percent of original size [2021-02-19 17:42:07,248 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:07,248 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-02-19 17:42:07,248 INFO L518 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2021-02-19 17:42:07,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:07,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-02-19 17:42:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:07,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:07,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 17:42:07,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458180977] [2021-02-19 17:42:07,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:07,297 INFO L87 Difference]: Start difference. First operand 28 states and 52 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) [2021-02-19 17:42:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:07,582 INFO L93 Difference]: Finished difference Result 56 states and 104 transitions. [2021-02-19 17:42:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:07,582 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 [2021-02-19 17:42:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:07,583 INFO L225 Difference]: With dead ends: 56 [2021-02-19 17:42:07,583 INFO L226 Difference]: Without dead ends: 53 [2021-02-19 17:42:07,583 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-19 17:42:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2021-02-19 17:42:07,585 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) [2021-02-19 17:42:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-02-19 17:42:07,586 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2021-02-19 17:42:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:07,586 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-02-19 17:42:07,586 INFO L481 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) [2021-02-19 17:42:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-02-19 17:42:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:42:07,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:07,586 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:07,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 17:42:07,806 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:07,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:07,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1514371285, now seen corresponding path program 2 times [2021-02-19 17:42:07,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:07,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364970441] [2021-02-19 17:42:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:07,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364970441] [2021-02-19 17:42:07,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532737058] [2021-02-19 17:42:07,997 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 [2021-02-19 17:42:08,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:08,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:42:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:08,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,242 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 27 treesize of output 21 [2021-02-19 17:42:08,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:08,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,248 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 25 treesize of output 19 [2021-02-19 17:42:08,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:08,262 INFO L628 ElimStorePlain]: treesize reduction 77, result has 12.5 percent of original size [2021-02-19 17:42:08,263 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:08,263 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-02-19 17:42:08,263 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-02-19 17:42:08,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:08,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:107, output treesize:11 [2021-02-19 17:42:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:08,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:08,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 17:42:08,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719293864] [2021-02-19 17:42:08,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:08,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:08,279 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:08,433 INFO L93 Difference]: Finished difference Result 57 states and 107 transitions. [2021-02-19 17:42:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:08,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:42:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:08,434 INFO L225 Difference]: With dead ends: 57 [2021-02-19 17:42:08,434 INFO L226 Difference]: Without dead ends: 54 [2021-02-19 17:42:08,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-19 17:42:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-02-19 17:42:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2021-02-19 17:42:08,442 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 12 [2021-02-19 17:42:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:08,442 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2021-02-19 17:42:08,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2021-02-19 17:42:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:42:08,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:08,445 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:08,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:08,650 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1506640887, now seen corresponding path program 3 times [2021-02-19 17:42:08,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:08,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713657796] [2021-02-19 17:42:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:08,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713657796] [2021-02-19 17:42:08,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457790884] [2021-02-19 17:42:08,805 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) [2021-02-19 17:42:08,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:08,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:42:08,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,950 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 15 treesize of output 11 [2021-02-19 17:42:08,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:08,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,958 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 35 treesize of output 27 [2021-02-19 17:42:08,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:42:08,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:08,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:08,973 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 25 treesize of output 19 [2021-02-19 17:42:08,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:09,052 INFO L628 ElimStorePlain]: treesize reduction 89, result has 45.1 percent of original size [2021-02-19 17:42:09,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:09,056 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 21 treesize of output 13 [2021-02-19 17:42:09,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:09,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:09,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:09,088 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:201, output treesize:62 [2021-02-19 17:42:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:42:09,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178780733] [2021-02-19 17:42:09,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:09,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:09,192 INFO L87 Difference]: Start difference. First operand 43 states and 88 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) [2021-02-19 17:42:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:09,362 INFO L93 Difference]: Finished difference Result 70 states and 136 transitions. [2021-02-19 17:42:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:42:09,363 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 [2021-02-19 17:42:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:09,364 INFO L225 Difference]: With dead ends: 70 [2021-02-19 17:42:09,364 INFO L226 Difference]: Without dead ends: 64 [2021-02-19 17:42:09,364 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-19 17:42:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-02-19 17:42:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 47 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 104 transitions. [2021-02-19 17:42:09,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 104 transitions. Word has length 12 [2021-02-19 17:42:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:09,367 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 104 transitions. [2021-02-19 17:42:09,367 INFO L481 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) [2021-02-19 17:42:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 104 transitions. [2021-02-19 17:42:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:42:09,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:09,368 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:09,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:09,578 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1983860259, now seen corresponding path program 4 times [2021-02-19 17:42:09,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:09,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495498717] [2021-02-19 17:42:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:09,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495498717] [2021-02-19 17:42:09,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637818102] [2021-02-19 17:42:09,794 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 [2021-02-19 17:42:09,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:09,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:42:09,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:09,918 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 36 treesize of output 28 [2021-02-19 17:42:09,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:09,930 INFO L628 ElimStorePlain]: treesize reduction 16, result has 40.7 percent of original size [2021-02-19 17:42:09,930 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:09,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:09,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:11 [2021-02-19 17:42:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:09,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:09,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 17:42:09,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970153919] [2021-02-19 17:42:09,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:09,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:09,957 INFO L87 Difference]: Start difference. First operand 48 states and 104 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2021-02-19 17:42:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:10,168 INFO L93 Difference]: Finished difference Result 79 states and 167 transitions. [2021-02-19 17:42:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 [2021-02-19 17:42:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:10,169 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:42:10,169 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:42:10,170 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:42:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2021-02-19 17:42:10,172 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) [2021-02-19 17:42:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2021-02-19 17:42:10,172 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 12 [2021-02-19 17:42:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:10,172 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2021-02-19 17:42:10,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2021-02-19 17:42:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2021-02-19 17:42:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:42:10,173 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:10,173 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:10,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 17:42:10,374 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash -976515707, now seen corresponding path program 5 times [2021-02-19 17:42:10,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:10,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224166329] [2021-02-19 17:42:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:10,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224166329] [2021-02-19 17:42:10,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007010295] [2021-02-19 17:42:10,560 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 [2021-02-19 17:42:10,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:10,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:42:10,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:10,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:10,789 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 25 treesize of output 19 [2021-02-19 17:42:10,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:10,807 INFO L628 ElimStorePlain]: treesize reduction 89, result has 11.0 percent of original size [2021-02-19 17:42:10,808 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:42:10,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-02-19 17:42:10,808 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:10,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:10,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-02-19 17:42:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:10,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:10,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 17:42:10,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661930107] [2021-02-19 17:42:10,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:10,824 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:10,966 INFO L93 Difference]: Finished difference Result 71 states and 146 transitions. [2021-02-19 17:42:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:42:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:10,967 INFO L225 Difference]: With dead ends: 71 [2021-02-19 17:42:10,968 INFO L226 Difference]: Without dead ends: 68 [2021-02-19 17:42:10,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-19 17:42:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2021-02-19 17:42:10,974 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) [2021-02-19 17:42:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2021-02-19 17:42:10,974 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 12 [2021-02-19 17:42:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:10,975 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2021-02-19 17:42:10,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2021-02-19 17:42:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:42:10,976 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:10,976 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:11,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:11,182 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash -968785309, now seen corresponding path program 6 times [2021-02-19 17:42:11,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:11,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979834389] [2021-02-19 17:42:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:11,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979834389] [2021-02-19 17:42:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019134942] [2021-02-19 17:42:11,314 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 [2021-02-19 17:42:11,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:42:11,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:11,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:42:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:11,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:11,504 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 25 treesize of output 19 [2021-02-19 17:42:11,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:11,524 INFO L628 ElimStorePlain]: treesize reduction 85, result has 11.5 percent of original size [2021-02-19 17:42:11,524 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:11,524 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-02-19 17:42:11,524 INFO L518 ElimStorePlain]: Eliminatee v_prenex_12 vanished before elimination [2021-02-19 17:42:11,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:11,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:107, output treesize:11 [2021-02-19 17:42:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:11,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:11,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 17:42:11,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305802257] [2021-02-19 17:42:11,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:11,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:11,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:11,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:11,549 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2021-02-19 17:42:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:11,701 INFO L93 Difference]: Finished difference Result 72 states and 148 transitions. [2021-02-19 17:42:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 [2021-02-19 17:42:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:11,702 INFO L225 Difference]: With dead ends: 72 [2021-02-19 17:42:11,702 INFO L226 Difference]: Without dead ends: 69 [2021-02-19 17:42:11,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-19 17:42:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2021-02-19 17:42:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 109 transitions. [2021-02-19 17:42:11,706 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 109 transitions. Word has length 12 [2021-02-19 17:42:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:11,706 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 109 transitions. [2021-02-19 17:42:11,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2021-02-19 17:42:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 109 transitions. [2021-02-19 17:42:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:11,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:11,707 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:11,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:11,918 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1580118821, now seen corresponding path program 7 times [2021-02-19 17:42:11,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:11,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790013170] [2021-02-19 17:42:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:11,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790013170] [2021-02-19 17:42:11,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15786846] [2021-02-19 17:42:11,996 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 [2021-02-19 17:42:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:12,105 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 [2021-02-19 17:42:12,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:12,110 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 17 treesize of output 13 [2021-02-19 17:42:12,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:12,116 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 [2021-02-19 17:42:12,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:12,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:12,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:12,130 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,153 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-02-19 17:42:12,154 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:12,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:12,155 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-02-19 17:42:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:12,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:12,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:12,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145512550] [2021-02-19 17:42:12,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:12,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:12,186 INFO L87 Difference]: Start difference. First operand 50 states and 109 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) [2021-02-19 17:42:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:12,456 INFO L93 Difference]: Finished difference Result 71 states and 147 transitions. [2021-02-19 17:42:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:12,456 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 [2021-02-19 17:42:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:12,457 INFO L225 Difference]: With dead ends: 71 [2021-02-19 17:42:12,457 INFO L226 Difference]: Without dead ends: 64 [2021-02-19 17:42:12,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-19 17:42:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2021-02-19 17:42:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.239130434782609) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 103 transitions. [2021-02-19 17:42:12,458 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 103 transitions. Word has length 13 [2021-02-19 17:42:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:12,459 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 103 transitions. [2021-02-19 17:42:12,459 INFO L481 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) [2021-02-19 17:42:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 103 transitions. [2021-02-19 17:42:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:12,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:12,459 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:12,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-02-19 17:42:12,662 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash -4067795, now seen corresponding path program 8 times [2021-02-19 17:42:12,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:12,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443984886] [2021-02-19 17:42:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443984886] [2021-02-19 17:42:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421905768] [2021-02-19 17:42:12,722 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:12,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:12,837 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 15 treesize of output 11 [2021-02-19 17:42:12,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,841 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 16 treesize of output 12 [2021-02-19 17:42:12,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,861 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-02-19 17:42:12,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:12,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:12,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-02-19 17:42:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:12,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:12,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:12,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223538485] [2021-02-19 17:42:12,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:12,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:12,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:12,883 INFO L87 Difference]: Start difference. First operand 47 states and 103 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) [2021-02-19 17:42:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:12,996 INFO L93 Difference]: Finished difference Result 70 states and 149 transitions. [2021-02-19 17:42:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:12,996 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 [2021-02-19 17:42:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:12,997 INFO L225 Difference]: With dead ends: 70 [2021-02-19 17:42:12,997 INFO L226 Difference]: Without dead ends: 70 [2021-02-19 17:42:12,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-19 17:42:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2021-02-19 17:42:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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) [2021-02-19 17:42:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 106 transitions. [2021-02-19 17:42:13,002 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 106 transitions. Word has length 13 [2021-02-19 17:42:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:13,003 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 106 transitions. [2021-02-19 17:42:13,003 INFO L481 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) [2021-02-19 17:42:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 106 transitions. [2021-02-19 17:42:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:13,005 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:13,005 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:13,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:13,222 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1853476645, now seen corresponding path program 9 times [2021-02-19 17:42:13,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:13,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109319194] [2021-02-19 17:42:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:13,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109319194] [2021-02-19 17:42:13,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276623932] [2021-02-19 17:42:13,298 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) [2021-02-19 17:42:13,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:13,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,418 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 17 treesize of output 13 [2021-02-19 17:42:13,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,423 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 [2021-02-19 17:42:13,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:13,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,430 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 15 treesize of output 11 [2021-02-19 17:42:13,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:13,436 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 [2021-02-19 17:42:13,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:13,479 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:13,479 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:13,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:13,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:13,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:13,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:13,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290184631] [2021-02-19 17:42:13,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:13,539 INFO L87 Difference]: Start difference. First operand 48 states and 106 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) [2021-02-19 17:42:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:13,848 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2021-02-19 17:42:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:13,848 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 [2021-02-19 17:42:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:13,850 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:42:13,850 INFO L226 Difference]: Without dead ends: 114 [2021-02-19 17:42:13,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-02-19 17:42:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2021-02-19 17:42:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.36) internal successors, (118), 50 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) [2021-02-19 17:42:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 118 transitions. [2021-02-19 17:42:13,854 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 118 transitions. Word has length 13 [2021-02-19 17:42:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:13,855 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 118 transitions. [2021-02-19 17:42:13,855 INFO L481 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) [2021-02-19 17:42:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 118 transitions. [2021-02-19 17:42:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:13,855 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:13,855 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:14,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:14,070 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1051860417, now seen corresponding path program 10 times [2021-02-19 17:42:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:14,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427656686] [2021-02-19 17:42:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:14,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427656686] [2021-02-19 17:42:14,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231671522] [2021-02-19 17:42:14,148 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 [2021-02-19 17:42:14,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:14,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,243 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 [2021-02-19 17:42:14,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:14,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,248 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 [2021-02-19 17:42:14,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:14,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,256 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 15 treesize of output 11 [2021-02-19 17:42:14,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:14,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:14,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:14,296 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:14,297 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:14,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:14,297 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:14,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:14,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884401348] [2021-02-19 17:42:14,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:14,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:14,381 INFO L87 Difference]: Start difference. First operand 51 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) [2021-02-19 17:42:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:14,929 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-02-19 17:42:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:42:14,929 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 [2021-02-19 17:42:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:14,930 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:42:14,930 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:42:14,930 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:42:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 53. [2021-02-19 17:42:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 120 transitions. [2021-02-19 17:42:14,932 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 120 transitions. Word has length 13 [2021-02-19 17:42:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:14,933 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 120 transitions. [2021-02-19 17:42:14,933 INFO L481 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) [2021-02-19 17:42:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 120 transitions. [2021-02-19 17:42:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:14,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:14,933 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:15,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:15,134 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:15,134 INFO L82 PathProgramCache]: Analyzing trace with hash 666483289, now seen corresponding path program 11 times [2021-02-19 17:42:15,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:15,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677668113] [2021-02-19 17:42:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:15,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677668113] [2021-02-19 17:42:15,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100920556] [2021-02-19 17:42:15,216 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) [2021-02-19 17:42:15,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:42:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:15,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:15,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:15,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,330 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 [2021-02-19 17:42:15,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,335 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 15 treesize of output 11 [2021-02-19 17:42:15,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:15,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:15,339 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 [2021-02-19 17:42:15,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:15,383 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:15,383 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:15,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:15,384 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:15,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:15,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435715098] [2021-02-19 17:42:15,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:15,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:15,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:15,438 INFO L87 Difference]: Start difference. First operand 53 states and 120 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) [2021-02-19 17:42:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:15,806 INFO L93 Difference]: Finished difference Result 95 states and 196 transitions. [2021-02-19 17:42:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:15,807 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 [2021-02-19 17:42:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:15,808 INFO L225 Difference]: With dead ends: 95 [2021-02-19 17:42:15,808 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 17:42:15,808 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 17:42:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2021-02-19 17:42:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 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) [2021-02-19 17:42:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 115 transitions. [2021-02-19 17:42:15,810 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 115 transitions. Word has length 13 [2021-02-19 17:42:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:15,811 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 115 transitions. [2021-02-19 17:42:15,811 INFO L481 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) [2021-02-19 17:42:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 115 transitions. [2021-02-19 17:42:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:15,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:15,811 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:16,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 17:42:16,026 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1044130019, now seen corresponding path program 12 times [2021-02-19 17:42:16,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:16,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883686766] [2021-02-19 17:42:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:16,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883686766] [2021-02-19 17:42:16,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188997203] [2021-02-19 17:42:16,097 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 [2021-02-19 17:42:16,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:42:16,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:16,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:16,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:16,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:16,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:16,237 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 [2021-02-19 17:42:16,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:16,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:16,241 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 [2021-02-19 17:42:16,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:16,269 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:42:16,269 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:16,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:16,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:42:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:16,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:16,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:16,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625039826] [2021-02-19 17:42:16,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:16,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:16,294 INFO L87 Difference]: Start difference. First operand 52 states and 115 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) [2021-02-19 17:42:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:16,382 INFO L93 Difference]: Finished difference Result 79 states and 170 transitions. [2021-02-19 17:42:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:16,389 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 [2021-02-19 17:42:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:16,389 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:42:16,389 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 17:42:16,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 17:42:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2021-02-19 17:42:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 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) [2021-02-19 17:42:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 115 transitions. [2021-02-19 17:42:16,392 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 115 transitions. Word has length 13 [2021-02-19 17:42:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:16,392 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 115 transitions. [2021-02-19 17:42:16,392 INFO L481 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) [2021-02-19 17:42:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 115 transitions. [2021-02-19 17:42:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:16,393 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:16,393 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:16,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 17:42:16,610 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1239138911, now seen corresponding path program 13 times [2021-02-19 17:42:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:16,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165972087] [2021-02-19 17:42:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:16,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165972087] [2021-02-19 17:42:16,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185178792] [2021-02-19 17:42:16,690 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) [2021-02-19 17:42:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:16,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:16,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:16,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:16,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:16,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:16,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:16,825 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:42:16,826 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:16,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:16,826 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:42:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:16,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:16,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:16,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179329803] [2021-02-19 17:42:16,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:16,852 INFO L87 Difference]: Start difference. First operand 52 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) [2021-02-19 17:42:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:16,944 INFO L93 Difference]: Finished difference Result 85 states and 175 transitions. [2021-02-19 17:42:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:16,944 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 [2021-02-19 17:42:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:16,945 INFO L225 Difference]: With dead ends: 85 [2021-02-19 17:42:16,945 INFO L226 Difference]: Without dead ends: 85 [2021-02-19 17:42:16,945 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-19 17:42:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-02-19 17:42:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 135 transitions. [2021-02-19 17:42:16,950 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 135 transitions. Word has length 13 [2021-02-19 17:42:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:16,950 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 135 transitions. [2021-02-19 17:42:16,950 INFO L481 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) [2021-02-19 17:42:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 135 transitions. [2021-02-19 17:42:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:16,950 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:16,951 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:17,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 17:42:17,166 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:17,166 INFO L82 PathProgramCache]: Analyzing trace with hash 319438203, now seen corresponding path program 14 times [2021-02-19 17:42:17,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:17,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085411521] [2021-02-19 17:42:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:17,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085411521] [2021-02-19 17:42:17,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391034313] [2021-02-19 17:42:17,234 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) [2021-02-19 17:42:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:17,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:17,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:17,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:17,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:17,353 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 17 treesize of output 13 [2021-02-19 17:42:17,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:17,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:17,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:17,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:17,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:17,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:17,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:17,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:17,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:17,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:17,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:17,408 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:42:17,409 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:17,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:17,409 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:42:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:17,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:17,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:17,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112703652] [2021-02-19 17:42:17,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:17,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:17,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:17,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:17,447 INFO L87 Difference]: Start difference. First operand 58 states and 135 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) [2021-02-19 17:42:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:17,665 INFO L93 Difference]: Finished difference Result 79 states and 169 transitions. [2021-02-19 17:42:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:42:17,666 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 [2021-02-19 17:42:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:17,666 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:42:17,666 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:42:17,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:42:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2021-02-19 17:42:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 142 transitions. [2021-02-19 17:42:17,668 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 142 transitions. Word has length 13 [2021-02-19 17:42:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:17,668 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 142 transitions. [2021-02-19 17:42:17,668 INFO L481 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) [2021-02-19 17:42:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 142 transitions. [2021-02-19 17:42:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:17,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:17,669 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:17,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-02-19 17:42:17,891 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1246869309, now seen corresponding path program 15 times [2021-02-19 17:42:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:17,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517508709] [2021-02-19 17:42:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517508709] [2021-02-19 17:42:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288122777] [2021-02-19 17:42:17,969 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) [2021-02-19 17:42:17,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:17,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:18,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,065 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 17 treesize of output 13 [2021-02-19 17:42:18,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,071 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 16 treesize of output 12 [2021-02-19 17:42:18,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,077 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 15 treesize of output 11 [2021-02-19 17:42:18,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,081 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 [2021-02-19 17:42:18,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,123 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:18,124 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:18,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:18,125 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:18,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:18,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:18,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420829236] [2021-02-19 17:42:18,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:18,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:18,175 INFO L87 Difference]: Start difference. First operand 60 states and 142 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) [2021-02-19 17:42:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:18,389 INFO L93 Difference]: Finished difference Result 101 states and 193 transitions. [2021-02-19 17:42:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:18,390 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 [2021-02-19 17:42:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:18,390 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:42:18,390 INFO L226 Difference]: Without dead ends: 100 [2021-02-19 17:42:18,391 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-19 17:42:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 59. [2021-02-19 17:42:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 58 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 135 transitions. [2021-02-19 17:42:18,393 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 135 transitions. Word has length 13 [2021-02-19 17:42:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:18,393 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 135 transitions. [2021-02-19 17:42:18,393 INFO L481 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) [2021-02-19 17:42:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 135 transitions. [2021-02-19 17:42:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:18,393 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:18,393 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:18,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 17:42:18,600 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2048485537, now seen corresponding path program 16 times [2021-02-19 17:42:18,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:18,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059530506] [2021-02-19 17:42:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:18,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059530506] [2021-02-19 17:42:18,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981599820] [2021-02-19 17:42:18,679 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) [2021-02-19 17:42:18,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:18,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:18,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,778 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 17 treesize of output 13 [2021-02-19 17:42:18,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:18,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,788 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 15 treesize of output 11 [2021-02-19 17:42:18,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:18,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:18,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:18,830 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:18,831 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:18,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:18,832 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:18,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:18,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:18,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339998857] [2021-02-19 17:42:18,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:18,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:18,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:18,915 INFO L87 Difference]: Start difference. First operand 59 states and 135 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) [2021-02-19 17:42:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:19,116 INFO L93 Difference]: Finished difference Result 85 states and 177 transitions. [2021-02-19 17:42:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:42:19,116 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 [2021-02-19 17:42:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:19,116 INFO L225 Difference]: With dead ends: 85 [2021-02-19 17:42:19,117 INFO L226 Difference]: Without dead ends: 81 [2021-02-19 17:42:19,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-19 17:42:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-02-19 17:42:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 60 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 140 transitions. [2021-02-19 17:42:19,129 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 140 transitions. Word has length 13 [2021-02-19 17:42:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:19,129 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 140 transitions. [2021-02-19 17:42:19,129 INFO L481 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) [2021-02-19 17:42:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 140 transitions. [2021-02-19 17:42:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:19,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:19,130 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:19,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 17:42:19,346 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash -528138053, now seen corresponding path program 17 times [2021-02-19 17:42:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:19,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753450902] [2021-02-19 17:42:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:19,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753450902] [2021-02-19 17:42:19,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791466804] [2021-02-19 17:42:19,418 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 [2021-02-19 17:42:19,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:42:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:19,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:19,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:19,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,503 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 [2021-02-19 17:42:19,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:19,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,508 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 [2021-02-19 17:42:19,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:19,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:19,512 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 [2021-02-19 17:42:19,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:19,556 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:19,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:19,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:19,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:19,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:19,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:19,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426588174] [2021-02-19 17:42:19,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:19,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:19,614 INFO L87 Difference]: Start difference. First operand 61 states and 140 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) [2021-02-19 17:42:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:19,765 INFO L93 Difference]: Finished difference Result 78 states and 171 transitions. [2021-02-19 17:42:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:19,766 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 [2021-02-19 17:42:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:19,766 INFO L225 Difference]: With dead ends: 78 [2021-02-19 17:42:19,766 INFO L226 Difference]: Without dead ends: 78 [2021-02-19 17:42:19,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-19 17:42:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-02-19 17:42:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2021-02-19 17:42:19,769 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 13 [2021-02-19 17:42:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:19,769 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2021-02-19 17:42:19,769 INFO L481 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) [2021-02-19 17:42:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2021-02-19 17:42:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:19,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:19,769 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:19,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:19,992 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -242535687, now seen corresponding path program 18 times [2021-02-19 17:42:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:19,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617612661] [2021-02-19 17:42:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617612661] [2021-02-19 17:42:20,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883537816] [2021-02-19 17:42:20,058 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 [2021-02-19 17:42:20,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:42:20,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:20,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,146 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 [2021-02-19 17:42:20,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,151 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 [2021-02-19 17:42:20,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,156 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 15 treesize of output 11 [2021-02-19 17:42:20,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,160 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 16 treesize of output 12 [2021-02-19 17:42:20,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,201 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:20,202 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:20,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:20,203 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:20,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:20,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890202756] [2021-02-19 17:42:20,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:20,260 INFO L87 Difference]: Start difference. First operand 60 states and 136 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) [2021-02-19 17:42:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:20,411 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2021-02-19 17:42:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:20,412 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 [2021-02-19 17:42:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:20,412 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:42:20,412 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:42:20,413 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:42:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2021-02-19 17:42:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 151 transitions. [2021-02-19 17:42:20,415 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 151 transitions. Word has length 13 [2021-02-19 17:42:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:20,415 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 151 transitions. [2021-02-19 17:42:20,415 INFO L481 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) [2021-02-19 17:42:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 151 transitions. [2021-02-19 17:42:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:20,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:20,417 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:20,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:20,630 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash 559080541, now seen corresponding path program 19 times [2021-02-19 17:42:20,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:20,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843150732] [2021-02-19 17:42:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843150732] [2021-02-19 17:42:20,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741177427] [2021-02-19 17:42:20,691 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 [2021-02-19 17:42:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:20,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,769 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 [2021-02-19 17:42:20,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,774 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 [2021-02-19 17:42:20,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,778 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 [2021-02-19 17:42:20,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:20,782 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 [2021-02-19 17:42:20,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:20,823 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:20,824 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:20,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:20,825 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:20,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:20,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190999672] [2021-02-19 17:42:20,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:20,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:20,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:20,907 INFO L87 Difference]: Start difference. First operand 64 states and 151 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) [2021-02-19 17:42:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:21,219 INFO L93 Difference]: Finished difference Result 97 states and 202 transitions. [2021-02-19 17:42:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:42:21,219 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 [2021-02-19 17:42:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:21,220 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:42:21,220 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:42:21,220 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:42:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2021-02-19 17:42:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 65 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 155 transitions. [2021-02-19 17:42:21,222 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 155 transitions. Word has length 13 [2021-02-19 17:42:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:21,222 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 155 transitions. [2021-02-19 17:42:21,223 INFO L481 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) [2021-02-19 17:42:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 155 transitions. [2021-02-19 17:42:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:21,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:21,223 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:21,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 17:42:21,434 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:21,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2017543049, now seen corresponding path program 20 times [2021-02-19 17:42:21,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:21,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960643256] [2021-02-19 17:42:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960643256] [2021-02-19 17:42:21,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592368975] [2021-02-19 17:42:21,493 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 [2021-02-19 17:42:21,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:21,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:21,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:21,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,586 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 17 treesize of output 13 [2021-02-19 17:42:21,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:21,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,591 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 [2021-02-19 17:42:21,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:21,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,606 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 15 treesize of output 11 [2021-02-19 17:42:21,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:21,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:21,611 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 [2021-02-19 17:42:21,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:21,646 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:21,646 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:21,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:21,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:21,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:21,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278275395] [2021-02-19 17:42:21,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:21,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:21,696 INFO L87 Difference]: Start difference. First operand 66 states and 155 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) [2021-02-19 17:42:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:21,892 INFO L93 Difference]: Finished difference Result 84 states and 184 transitions. [2021-02-19 17:42:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:21,893 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 [2021-02-19 17:42:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:21,893 INFO L225 Difference]: With dead ends: 84 [2021-02-19 17:42:21,893 INFO L226 Difference]: Without dead ends: 84 [2021-02-19 17:42:21,893 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-19 17:42:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-02-19 17:42:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 146 transitions. [2021-02-19 17:42:21,895 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 146 transitions. Word has length 13 [2021-02-19 17:42:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:21,896 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 146 transitions. [2021-02-19 17:42:21,896 INFO L481 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) [2021-02-19 17:42:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 146 transitions. [2021-02-19 17:42:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:21,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:21,896 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:22,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:22,102 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:22,102 INFO L82 PathProgramCache]: Analyzing trace with hash 566810939, now seen corresponding path program 21 times [2021-02-19 17:42:22,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:22,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730740537] [2021-02-19 17:42:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730740537] [2021-02-19 17:42:22,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291236997] [2021-02-19 17:42:22,154 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) [2021-02-19 17:42:22,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:22,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:22,286 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 15 treesize of output 11 [2021-02-19 17:42:22,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:22,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:22,291 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 16 treesize of output 12 [2021-02-19 17:42:22,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:22,321 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:42:22,322 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:22,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:22,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:42:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:22,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755511198] [2021-02-19 17:42:22,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:22,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:22,349 INFO L87 Difference]: Start difference. First operand 64 states and 146 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) [2021-02-19 17:42:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:22,429 INFO L93 Difference]: Finished difference Result 82 states and 181 transitions. [2021-02-19 17:42:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:22,430 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 [2021-02-19 17:42:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:22,430 INFO L225 Difference]: With dead ends: 82 [2021-02-19 17:42:22,430 INFO L226 Difference]: Without dead ends: 82 [2021-02-19 17:42:22,430 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-19 17:42:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-02-19 17:42:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 146 transitions. [2021-02-19 17:42:22,432 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 146 transitions. Word has length 13 [2021-02-19 17:42:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:22,433 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 146 transitions. [2021-02-19 17:42:22,433 INFO L481 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) [2021-02-19 17:42:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 146 transitions. [2021-02-19 17:42:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:22,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:22,434 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:22,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-02-19 17:42:22,650 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1546997851, now seen corresponding path program 22 times [2021-02-19 17:42:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:22,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716978365] [2021-02-19 17:42:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716978365] [2021-02-19 17:42:22,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082921984] [2021-02-19 17:42:22,702 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 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 [2021-02-19 17:42:22,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:22,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:22,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:22,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:22,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:22,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:22,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:22,820 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-02-19 17:42:22,820 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:22,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:22,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-02-19 17:42:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:22,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:22,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724674208] [2021-02-19 17:42:22,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:22,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:22,856 INFO L87 Difference]: Start difference. First operand 64 states and 146 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) [2021-02-19 17:42:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:22,964 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2021-02-19 17:42:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:22,965 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 [2021-02-19 17:42:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:22,965 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:42:22,965 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:42:22,966 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:42:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2021-02-19 17:42:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 145 transitions. [2021-02-19 17:42:22,969 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 145 transitions. Word has length 13 [2021-02-19 17:42:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:22,970 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 145 transitions. [2021-02-19 17:42:22,970 INFO L481 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) [2021-02-19 17:42:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 145 transitions. [2021-02-19 17:42:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:22,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:22,970 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:23,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:23,190 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1390433667, now seen corresponding path program 23 times [2021-02-19 17:42:23,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:23,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098040171] [2021-02-19 17:42:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098040171] [2021-02-19 17:42:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454542171] [2021-02-19 17:42:23,243 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 [2021-02-19 17:42:23,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:23,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:23,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:23,352 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 7 treesize of output 5 [2021-02-19 17:42:23,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:23,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:23,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:23,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:23,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:23,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:23,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:23,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:23,369 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 17 treesize of output 13 [2021-02-19 17:42:23,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:23,374 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 [2021-02-19 17:42:23,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:23,418 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-02-19 17:42:23,418 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:23,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:23,419 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-02-19 17:42:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:23,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:23,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:23,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748173785] [2021-02-19 17:42:23,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:23,449 INFO L87 Difference]: Start difference. First operand 63 states and 145 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) [2021-02-19 17:42:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:23,667 INFO L93 Difference]: Finished difference Result 94 states and 205 transitions. [2021-02-19 17:42:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:23,668 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 [2021-02-19 17:42:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:23,669 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:42:23,669 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:42:23,669 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:42:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2021-02-19 17:42:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.3225806451612905) internal successors, (144), 62 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2021-02-19 17:42:23,671 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 13 [2021-02-19 17:42:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:23,671 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2021-02-19 17:42:23,671 INFO L481 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) [2021-02-19 17:42:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2021-02-19 17:42:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:23,671 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:23,671 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:23,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:23,872 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378115, now seen corresponding path program 24 times [2021-02-19 17:42:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:23,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838358738] [2021-02-19 17:42:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:23,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838358738] [2021-02-19 17:42:23,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518092430] [2021-02-19 17:42:23,931 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 [2021-02-19 17:42:23,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:23,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,060 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 [2021-02-19 17:42:24,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,065 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 [2021-02-19 17:42:24,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,092 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:42:24,092 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:24,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:42:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:24,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:24,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835947237] [2021-02-19 17:42:24,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:24,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:24,114 INFO L87 Difference]: Start difference. First operand 63 states and 144 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) [2021-02-19 17:42:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:24,188 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2021-02-19 17:42:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:24,188 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 [2021-02-19 17:42:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:24,189 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:42:24,189 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:42:24,189 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:42:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2021-02-19 17:42:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.3225806451612905) internal successors, (144), 62 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2021-02-19 17:42:24,191 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 13 [2021-02-19 17:42:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:24,192 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2021-02-19 17:42:24,192 INFO L481 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) [2021-02-19 17:42:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2021-02-19 17:42:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:24,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:24,192 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:24,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:24,406 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1961888473, now seen corresponding path program 25 times [2021-02-19 17:42:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196822469] [2021-02-19 17:42:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196822469] [2021-02-19 17:42:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135999568] [2021-02-19 17:42:24,481 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 [2021-02-19 17:42:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:24,635 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 [2021-02-19 17:42:24,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,644 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 8 treesize of output 6 [2021-02-19 17:42:24,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:24,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,657 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 17 treesize of output 13 [2021-02-19 17:42:24,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:24,662 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 [2021-02-19 17:42:24,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:24,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:24,702 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:42:24,703 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:24,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:24,704 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:42:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:24,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:24,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859287833] [2021-02-19 17:42:24,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:24,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:24,731 INFO L87 Difference]: Start difference. First operand 63 states and 144 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) [2021-02-19 17:42:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:24,902 INFO L93 Difference]: Finished difference Result 93 states and 203 transitions. [2021-02-19 17:42:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:24,903 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 [2021-02-19 17:42:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:24,903 INFO L225 Difference]: With dead ends: 93 [2021-02-19 17:42:24,903 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:42:24,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:42:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:42:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2021-02-19 17:42:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-02-19 17:42:24,906 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 13 [2021-02-19 17:42:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:24,906 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-02-19 17:42:24,906 INFO L481 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) [2021-02-19 17:42:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-02-19 17:42:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:24,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:24,906 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:25,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:25,129 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1405647717, now seen corresponding path program 26 times [2021-02-19 17:42:25,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:25,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517876383] [2021-02-19 17:42:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517876383] [2021-02-19 17:42:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546143840] [2021-02-19 17:42:25,212 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 [2021-02-19 17:42:25,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:25,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:25,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:25,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:25,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:25,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:25,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:25,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,310 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 [2021-02-19 17:42:25,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:25,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:25,315 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 17 treesize of output 13 [2021-02-19 17:42:25,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:25,350 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:25,350 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:25,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:25,351 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:25,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:25,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379000807] [2021-02-19 17:42:25,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:25,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:25,397 INFO L87 Difference]: Start difference. First operand 63 states and 143 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) [2021-02-19 17:42:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:25,696 INFO L93 Difference]: Finished difference Result 134 states and 267 transitions. [2021-02-19 17:42:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:25,696 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 [2021-02-19 17:42:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:25,697 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:42:25,697 INFO L226 Difference]: Without dead ends: 134 [2021-02-19 17:42:25,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-19 17:42:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2021-02-19 17:42:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.34375) internal successors, (150), 64 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 150 transitions. [2021-02-19 17:42:25,699 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 150 transitions. Word has length 13 [2021-02-19 17:42:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:25,699 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 150 transitions. [2021-02-19 17:42:25,700 INFO L481 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) [2021-02-19 17:42:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 150 transitions. [2021-02-19 17:42:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:25,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:25,700 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:25,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:25,901 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash -604031489, now seen corresponding path program 27 times [2021-02-19 17:42:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:25,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584133288] [2021-02-19 17:42:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584133288] [2021-02-19 17:42:25,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545698675] [2021-02-19 17:42:25,974 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 [2021-02-19 17:42:25,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:26,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,065 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 16 treesize of output 12 [2021-02-19 17:42:26,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:26,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,069 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 16 treesize of output 12 [2021-02-19 17:42:26,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:26,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,073 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 [2021-02-19 17:42:26,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:26,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:26,077 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 [2021-02-19 17:42:26,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:26,112 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:26,112 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:26,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:26,113 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:26,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:26,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:26,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051461536] [2021-02-19 17:42:26,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:26,170 INFO L87 Difference]: Start difference. First operand 65 states and 150 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) [2021-02-19 17:42:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:26,642 INFO L93 Difference]: Finished difference Result 127 states and 255 transitions. [2021-02-19 17:42:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:42:26,642 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 [2021-02-19 17:42:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:26,643 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:42:26,643 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:42:26,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:42:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:42:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2021-02-19 17:42:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3384615384615386) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 152 transitions. [2021-02-19 17:42:26,645 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 152 transitions. Word has length 13 [2021-02-19 17:42:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:26,645 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 152 transitions. [2021-02-19 17:42:26,645 INFO L481 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) [2021-02-19 17:42:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 152 transitions. [2021-02-19 17:42:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:26,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:26,645 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:26,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:26,858 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1114312217, now seen corresponding path program 28 times [2021-02-19 17:42:26,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:26,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827135981] [2021-02-19 17:42:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827135981] [2021-02-19 17:42:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133884749] [2021-02-19 17:42:26,947 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 [2021-02-19 17:42:26,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:27,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,033 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 [2021-02-19 17:42:27,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,037 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 [2021-02-19 17:42:27,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,042 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 17 treesize of output 13 [2021-02-19 17:42:27,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,077 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:27,077 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:27,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:27,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:27,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:27,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:27,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626164730] [2021-02-19 17:42:27,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:27,135 INFO L87 Difference]: Start difference. First operand 66 states and 152 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) [2021-02-19 17:42:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:27,433 INFO L93 Difference]: Finished difference Result 117 states and 240 transitions. [2021-02-19 17:42:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:27,434 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 [2021-02-19 17:42:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:27,434 INFO L225 Difference]: With dead ends: 117 [2021-02-19 17:42:27,434 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:42:27,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:42:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 64. [2021-02-19 17:42:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2857142857142856) internal successors, (144), 63 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 144 transitions. [2021-02-19 17:42:27,437 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 144 transitions. Word has length 13 [2021-02-19 17:42:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:27,437 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 144 transitions. [2021-02-19 17:42:27,437 INFO L481 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) [2021-02-19 17:42:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 144 transitions. [2021-02-19 17:42:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:27,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:27,437 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:27,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 17:42:27,642 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash 732792645, now seen corresponding path program 29 times [2021-02-19 17:42:27,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:27,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960441899] [2021-02-19 17:42:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:27,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960441899] [2021-02-19 17:42:27,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193549316] [2021-02-19 17:42:27,705 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) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:27,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:27,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,822 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 [2021-02-19 17:42:27,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:27,826 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 [2021-02-19 17:42:27,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,854 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:42:27,855 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:27,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:27,856 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:42:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:27,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:27,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:27,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968447461] [2021-02-19 17:42:27,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:27,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:27,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:27,882 INFO L87 Difference]: Start difference. First operand 64 states and 144 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) [2021-02-19 17:42:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:27,981 INFO L93 Difference]: Finished difference Result 97 states and 200 transitions. [2021-02-19 17:42:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:27,981 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 [2021-02-19 17:42:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:27,982 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:42:27,982 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:42:27,982 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:42:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2021-02-19 17:42:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-02-19 17:42:27,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 13 [2021-02-19 17:42:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:27,986 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-02-19 17:42:27,986 INFO L481 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) [2021-02-19 17:42:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-02-19 17:42:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:27,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:27,987 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:28,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:28,209 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash -186908063, now seen corresponding path program 30 times [2021-02-19 17:42:28,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:28,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950731664] [2021-02-19 17:42:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950731664] [2021-02-19 17:42:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645161278] [2021-02-19 17:42:28,276 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 [2021-02-19 17:42:28,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:28,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:28,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:28,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:28,417 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 [2021-02-19 17:42:28,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:28,421 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 [2021-02-19 17:42:28,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:28,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:28,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:28,425 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 17 treesize of output 13 [2021-02-19 17:42:28,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:28,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:28,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:28,429 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 [2021-02-19 17:42:28,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:28,433 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 7 treesize of output 5 [2021-02-19 17:42:28,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:28,465 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:42:28,465 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:28,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:28,467 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:42:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:28,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:28,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253395038] [2021-02-19 17:42:28,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:28,496 INFO L87 Difference]: Start difference. First operand 65 states and 148 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) [2021-02-19 17:42:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:28,736 INFO L93 Difference]: Finished difference Result 88 states and 187 transitions. [2021-02-19 17:42:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:42:28,737 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 [2021-02-19 17:42:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:28,737 INFO L225 Difference]: With dead ends: 88 [2021-02-19 17:42:28,737 INFO L226 Difference]: Without dead ends: 85 [2021-02-19 17:42:28,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-19 17:42:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-02-19 17:42:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 155 transitions. [2021-02-19 17:42:28,739 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 155 transitions. Word has length 13 [2021-02-19 17:42:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:28,740 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 155 transitions. [2021-02-19 17:42:28,740 INFO L481 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) [2021-02-19 17:42:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 155 transitions. [2021-02-19 17:42:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:28,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:28,740 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:28,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-02-19 17:42:28,950 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash 740523043, now seen corresponding path program 31 times [2021-02-19 17:42:28,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:28,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304320090] [2021-02-19 17:42:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304320090] [2021-02-19 17:42:29,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259457806] [2021-02-19 17:42:29,027 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 [2021-02-19 17:42:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:29,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:29,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,122 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 [2021-02-19 17:42:29,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,127 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 [2021-02-19 17:42:29,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,132 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 [2021-02-19 17:42:29,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:29,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,178 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:29,179 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:29,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:29,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:29,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:29,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351312422] [2021-02-19 17:42:29,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:29,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:29,231 INFO L87 Difference]: Start difference. First operand 67 states and 155 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) [2021-02-19 17:42:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:29,479 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2021-02-19 17:42:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:29,480 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 [2021-02-19 17:42:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:29,480 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:42:29,480 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:42:29,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:42:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2021-02-19 17:42:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2021-02-19 17:42:29,483 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 13 [2021-02-19 17:42:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:29,483 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2021-02-19 17:42:29,483 INFO L481 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) [2021-02-19 17:42:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2021-02-19 17:42:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:29,483 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:29,483 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:29,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:29,705 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:29,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1542139271, now seen corresponding path program 32 times [2021-02-19 17:42:29,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:29,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660048309] [2021-02-19 17:42:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660048309] [2021-02-19 17:42:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386395483] [2021-02-19 17:42:29,784 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 [2021-02-19 17:42:29,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:29,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:29,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,868 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 16 treesize of output 12 [2021-02-19 17:42:29,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,876 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 [2021-02-19 17:42:29,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,882 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 15 treesize of output 11 [2021-02-19 17:42:29,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:29,889 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 17 treesize of output 13 [2021-02-19 17:42:29,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:29,930 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:29,930 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:29,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:29,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:30,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:30,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427997084] [2021-02-19 17:42:30,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:30,005 INFO L87 Difference]: Start difference. First operand 63 states and 139 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) [2021-02-19 17:42:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:30,234 INFO L93 Difference]: Finished difference Result 86 states and 176 transitions. [2021-02-19 17:42:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:42:30,234 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 [2021-02-19 17:42:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:30,235 INFO L225 Difference]: With dead ends: 86 [2021-02-19 17:42:30,235 INFO L226 Difference]: Without dead ends: 82 [2021-02-19 17:42:30,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-19 17:42:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-02-19 17:42:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 144 transitions. [2021-02-19 17:42:30,237 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 144 transitions. Word has length 13 [2021-02-19 17:42:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:30,237 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 144 transitions. [2021-02-19 17:42:30,237 INFO L481 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) [2021-02-19 17:42:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 144 transitions. [2021-02-19 17:42:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:30,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:30,237 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:30,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:30,438 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1034484319, now seen corresponding path program 33 times [2021-02-19 17:42:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:30,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078000666] [2021-02-19 17:42:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078000666] [2021-02-19 17:42:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251248586] [2021-02-19 17:42:30,509 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 [2021-02-19 17:42:30,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:30,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:30,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,606 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 [2021-02-19 17:42:30,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:30,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,611 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 [2021-02-19 17:42:30,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,617 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 15 treesize of output 11 [2021-02-19 17:42:30,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:30,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:30,621 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 [2021-02-19 17:42:30,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:30,659 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:30,659 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:30,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:30,660 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:30,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:30,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:30,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362884921] [2021-02-19 17:42:30,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:30,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:30,718 INFO L87 Difference]: Start difference. First operand 65 states and 144 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) [2021-02-19 17:42:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:30,828 INFO L93 Difference]: Finished difference Result 79 states and 170 transitions. [2021-02-19 17:42:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:30,829 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 [2021-02-19 17:42:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:30,829 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:42:30,829 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 17:42:30,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 17:42:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-19 17:42:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 131 transitions. [2021-02-19 17:42:30,831 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 131 transitions. Word has length 13 [2021-02-19 17:42:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:30,831 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 131 transitions. [2021-02-19 17:42:30,831 INFO L481 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) [2021-02-19 17:42:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 131 transitions. [2021-02-19 17:42:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:30,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:30,831 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:31,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-02-19 17:42:31,042 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash -748881953, now seen corresponding path program 34 times [2021-02-19 17:42:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:31,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890034654] [2021-02-19 17:42:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890034654] [2021-02-19 17:42:31,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122607045] [2021-02-19 17:42:31,104 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 [2021-02-19 17:42:31,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:31,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:31,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,182 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 16 treesize of output 12 [2021-02-19 17:42:31,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,186 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 [2021-02-19 17:42:31,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,193 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 15 treesize of output 11 [2021-02-19 17:42:31,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,197 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 [2021-02-19 17:42:31,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,236 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:31,236 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:31,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:31,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:31,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:31,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366415670] [2021-02-19 17:42:31,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:31,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:31,282 INFO L87 Difference]: Start difference. First operand 60 states and 131 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) [2021-02-19 17:42:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:31,445 INFO L93 Difference]: Finished difference Result 107 states and 212 transitions. [2021-02-19 17:42:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:31,445 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 [2021-02-19 17:42:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:31,446 INFO L225 Difference]: With dead ends: 107 [2021-02-19 17:42:31,446 INFO L226 Difference]: Without dead ends: 107 [2021-02-19 17:42:31,446 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-19 17:42:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 64. [2021-02-19 17:42:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 146 transitions. [2021-02-19 17:42:31,448 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 146 transitions. Word has length 13 [2021-02-19 17:42:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:31,448 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 146 transitions. [2021-02-19 17:42:31,448 INFO L481 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) [2021-02-19 17:42:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 146 transitions. [2021-02-19 17:42:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:31,449 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:31,449 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:31,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:31,671 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:31,672 INFO L82 PathProgramCache]: Analyzing trace with hash 52734275, now seen corresponding path program 35 times [2021-02-19 17:42:31,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:31,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448155089] [2021-02-19 17:42:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448155089] [2021-02-19 17:42:31,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374845972] [2021-02-19 17:42:31,725 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 [2021-02-19 17:42:31,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:42:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:31,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:31,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:31,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:31,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:31,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:31,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:31,843 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:31,844 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:31,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:31,844 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:31,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705500462] [2021-02-19 17:42:31,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:31,910 INFO L87 Difference]: Start difference. First operand 64 states and 146 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) [2021-02-19 17:42:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:32,156 INFO L93 Difference]: Finished difference Result 98 states and 198 transitions. [2021-02-19 17:42:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:42:32,156 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 [2021-02-19 17:42:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:32,157 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:42:32,157 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:42:32,157 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:42:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2021-02-19 17:42:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 150 transitions. [2021-02-19 17:42:32,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 150 transitions. Word has length 13 [2021-02-19 17:42:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:32,159 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 150 transitions. [2021-02-19 17:42:32,159 INFO L481 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) [2021-02-19 17:42:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 150 transitions. [2021-02-19 17:42:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:32,159 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:32,160 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:32,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-02-19 17:42:32,374 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1771077981, now seen corresponding path program 36 times [2021-02-19 17:42:32,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:32,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443960387] [2021-02-19 17:42:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:32,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443960387] [2021-02-19 17:42:32,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967599766] [2021-02-19 17:42:32,432 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 [2021-02-19 17:42:32,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:42:32,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:32,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:32,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,506 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 16 treesize of output 12 [2021-02-19 17:42:32,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:32,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,512 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 16 treesize of output 12 [2021-02-19 17:42:32,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:32,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,517 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 15 treesize of output 11 [2021-02-19 17:42:32,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:32,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:32,521 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 17 treesize of output 13 [2021-02-19 17:42:32,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:32,564 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:32,564 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:32,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:32,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:32,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:32,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:32,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111579902] [2021-02-19 17:42:32,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:32,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:32,619 INFO L87 Difference]: Start difference. First operand 66 states and 150 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) [2021-02-19 17:42:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:32,772 INFO L93 Difference]: Finished difference Result 83 states and 177 transitions. [2021-02-19 17:42:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:32,773 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 [2021-02-19 17:42:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:32,773 INFO L225 Difference]: With dead ends: 83 [2021-02-19 17:42:32,773 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 17:42:32,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 17:42:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-02-19 17:42:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 138 transitions. [2021-02-19 17:42:32,775 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 138 transitions. Word has length 13 [2021-02-19 17:42:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:32,775 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 138 transitions. [2021-02-19 17:42:32,776 INFO L481 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) [2021-02-19 17:42:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 138 transitions. [2021-02-19 17:42:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:42:32,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:32,776 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:32,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:32,990 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash 60464673, now seen corresponding path program 37 times [2021-02-19 17:42:32,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:32,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385602294] [2021-02-19 17:42:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385602294] [2021-02-19 17:42:33,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342098982] [2021-02-19 17:42:33,039 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 [2021-02-19 17:42:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:42:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:33,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:33,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:33,123 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 15 treesize of output 11 [2021-02-19 17:42:33,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:33,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:33,127 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 [2021-02-19 17:42:33,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:33,155 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:42:33,155 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:33,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:33,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:42:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:33,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:33,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193823254] [2021-02-19 17:42:33,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:33,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:33,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:33,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:33,184 INFO L87 Difference]: Start difference. First operand 63 states and 138 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) [2021-02-19 17:42:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:33,250 INFO L93 Difference]: Finished difference Result 80 states and 171 transitions. [2021-02-19 17:42:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:33,253 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 [2021-02-19 17:42:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:33,253 INFO L225 Difference]: With dead ends: 80 [2021-02-19 17:42:33,253 INFO L226 Difference]: Without dead ends: 80 [2021-02-19 17:42:33,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-19 17:42:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-02-19 17:42:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 58 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) [2021-02-19 17:42:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 129 transitions. [2021-02-19 17:42:33,255 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 129 transitions. Word has length 13 [2021-02-19 17:42:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:33,255 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 129 transitions. [2021-02-19 17:42:33,255 INFO L481 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) [2021-02-19 17:42:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 129 transitions. [2021-02-19 17:42:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:33,256 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:33,256 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:33,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-02-19 17:42:33,478 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash -127183801, now seen corresponding path program 38 times [2021-02-19 17:42:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:33,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343892374] [2021-02-19 17:42:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343892374] [2021-02-19 17:42:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223398221] [2021-02-19 17:42:33,879 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 [2021-02-19 17:42:33,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:34,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:34,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:34,279 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 [2021-02-19 17:42:34,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:34,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:34,286 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 [2021-02-19 17:42:34,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:34,309 INFO L628 ElimStorePlain]: treesize reduction 84, result has 11.6 percent of original size [2021-02-19 17:42:34,309 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:34,310 INFO L518 ElimStorePlain]: Eliminatee v_prenex_18 vanished before elimination [2021-02-19 17:42:34,310 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-02-19 17:42:34,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:34,310 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:34,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:34,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:34,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700666909] [2021-02-19 17:42:34,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:34,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:34,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:34,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:34,340 INFO L87 Difference]: Start difference. First operand 59 states and 129 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) [2021-02-19 17:42:34,683 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-19 17:42:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:35,016 INFO L93 Difference]: Finished difference Result 104 states and 216 transitions. [2021-02-19 17:42:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:35,017 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 [2021-02-19 17:42:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:35,017 INFO L225 Difference]: With dead ends: 104 [2021-02-19 17:42:35,017 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:42:35,018 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:42:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 69. [2021-02-19 17:42:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.235294117647059) internal successors, (152), 68 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 152 transitions. [2021-02-19 17:42:35,019 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 152 transitions. Word has length 14 [2021-02-19 17:42:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:35,020 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 152 transitions. [2021-02-19 17:42:35,020 INFO L481 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) [2021-02-19 17:42:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 152 transitions. [2021-02-19 17:42:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:35,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:35,020 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:35,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 17:42:35,234 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:35,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1602893365, now seen corresponding path program 39 times [2021-02-19 17:42:35,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:35,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414739966] [2021-02-19 17:42:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414739966] [2021-02-19 17:42:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615509216] [2021-02-19 17:42:35,541 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 [2021-02-19 17:42:35,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:35,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:35,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:35,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:35,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:35,926 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 [2021-02-19 17:42:35,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:35,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:35,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:35,935 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 [2021-02-19 17:42:35,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:35,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:35,942 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 [2021-02-19 17:42:35,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:35,960 INFO L628 ElimStorePlain]: treesize reduction 68, result has 13.9 percent of original size [2021-02-19 17:42:35,960 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:35,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:35,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-02-19 17:42:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:35,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:35,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313438780] [2021-02-19 17:42:35,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:35,990 INFO L87 Difference]: Start difference. First operand 69 states and 152 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) [2021-02-19 17:42:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:36,620 INFO L93 Difference]: Finished difference Result 135 states and 273 transitions. [2021-02-19 17:42:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:42:36,621 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 [2021-02-19 17:42:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:36,621 INFO L225 Difference]: With dead ends: 135 [2021-02-19 17:42:36,621 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:42:36,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:42:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2021-02-19 17:42:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.3703703703703702) internal successors, (192), 81 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 192 transitions. [2021-02-19 17:42:36,623 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 192 transitions. Word has length 14 [2021-02-19 17:42:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:36,623 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 192 transitions. [2021-02-19 17:42:36,623 INFO L481 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) [2021-02-19 17:42:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 192 transitions. [2021-02-19 17:42:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:36,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:36,624 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:36,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:36,824 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:36,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1595162967, now seen corresponding path program 40 times [2021-02-19 17:42:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:36,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303051663] [2021-02-19 17:42:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303051663] [2021-02-19 17:42:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985808724] [2021-02-19 17:42:37,152 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 [2021-02-19 17:42:37,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:37,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:37,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:37,566 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 [2021-02-19 17:42:37,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:37,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:37,578 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 [2021-02-19 17:42:37,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:37,594 INFO L628 ElimStorePlain]: treesize reduction 84, result has 11.6 percent of original size [2021-02-19 17:42:37,594 INFO L518 ElimStorePlain]: Eliminatee v_prenex_21 vanished before elimination [2021-02-19 17:42:37,594 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:37,594 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-02-19 17:42:37,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:37,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:37,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:37,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588075975] [2021-02-19 17:42:37,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:37,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:37,623 INFO L87 Difference]: Start difference. First operand 82 states and 192 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) [2021-02-19 17:42:38,002 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-02-19 17:42:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:38,303 INFO L93 Difference]: Finished difference Result 117 states and 254 transitions. [2021-02-19 17:42:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:42:38,304 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 [2021-02-19 17:42:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:38,304 INFO L225 Difference]: With dead ends: 117 [2021-02-19 17:42:38,304 INFO L226 Difference]: Without dead ends: 110 [2021-02-19 17:42:38,304 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-19 17:42:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2021-02-19 17:42:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.3580246913580245) internal successors, (191), 81 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 191 transitions. [2021-02-19 17:42:38,306 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 191 transitions. Word has length 14 [2021-02-19 17:42:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:38,307 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 191 transitions. [2021-02-19 17:42:38,307 INFO L481 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) [2021-02-19 17:42:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 191 transitions. [2021-02-19 17:42:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:38,307 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:38,307 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:38,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 17:42:38,508 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1210399333, now seen corresponding path program 41 times [2021-02-19 17:42:38,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:38,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060158289] [2021-02-19 17:42:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060158289] [2021-02-19 17:42:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136705025] [2021-02-19 17:42:38,928 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 [2021-02-19 17:42:38,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:42:38,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:38,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:39,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:39,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:39,238 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 [2021-02-19 17:42:39,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:39,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:39,245 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 [2021-02-19 17:42:39,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:39,266 INFO L628 ElimStorePlain]: treesize reduction 84, result has 11.6 percent of original size [2021-02-19 17:42:39,266 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:39,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-02-19 17:42:39,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-02-19 17:42:39,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:39,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:39,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 17:42:39,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085682694] [2021-02-19 17:42:39,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:42:39,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:39,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:42:39,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:42:39,303 INFO L87 Difference]: Start difference. First operand 82 states and 191 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) [2021-02-19 17:42:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:40,002 INFO L93 Difference]: Finished difference Result 101 states and 228 transitions. [2021-02-19 17:42:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:40,002 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 [2021-02-19 17:42:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:40,003 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:42:40,003 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:42:40,003 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:42:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2021-02-19 17:42:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.3580246913580245) internal successors, (191), 81 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 191 transitions. [2021-02-19 17:42:40,005 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 191 transitions. Word has length 14 [2021-02-19 17:42:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:40,005 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 191 transitions. [2021-02-19 17:42:40,005 INFO L481 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) [2021-02-19 17:42:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 191 transitions. [2021-02-19 17:42:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:40,006 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:40,006 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:40,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:40,228 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -221091641, now seen corresponding path program 42 times [2021-02-19 17:42:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:40,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466641843] [2021-02-19 17:42:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:40,420 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 17:42:40,610 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-02-19 17:42:40,794 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-02-19 17:42:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:40,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466641843] [2021-02-19 17:42:40,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492956220] [2021-02-19 17:42:40,858 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 [2021-02-19 17:42:40,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:40,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:41,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:41,134 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 [2021-02-19 17:42:41,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:41,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:41,141 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 [2021-02-19 17:42:41,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:41,147 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 [2021-02-19 17:42:41,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:41,161 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:42:41,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:41,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:41,162 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-02-19 17:42:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:41,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:41,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456097273] [2021-02-19 17:42:41,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:41,187 INFO L87 Difference]: Start difference. First operand 82 states and 191 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) [2021-02-19 17:42:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:41,450 INFO L93 Difference]: Finished difference Result 97 states and 220 transitions. [2021-02-19 17:42:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:42:41,451 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 [2021-02-19 17:42:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:41,451 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:42:41,451 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:42:41,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:42:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-02-19 17:42:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.3452380952380953) internal successors, (197), 84 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 197 transitions. [2021-02-19 17:42:41,454 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 197 transitions. Word has length 14 [2021-02-19 17:42:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:41,454 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 197 transitions. [2021-02-19 17:42:41,454 INFO L481 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) [2021-02-19 17:42:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 197 transitions. [2021-02-19 17:42:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:41,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:41,454 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:41,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-02-19 17:42:41,658 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:41,658 INFO L82 PathProgramCache]: Analyzing trace with hash 26281095, now seen corresponding path program 43 times [2021-02-19 17:42:41,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:41,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869363277] [2021-02-19 17:42:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869363277] [2021-02-19 17:42:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010966809] [2021-02-19 17:42:41,957 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 [2021-02-19 17:42:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:41,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:41,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,312 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 [2021-02-19 17:42:42,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:42,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,320 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 [2021-02-19 17:42:42,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,338 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-02-19 17:42:42,339 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:42,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_29 vanished before elimination [2021-02-19 17:42:42,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-02-19 17:42:42,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:42,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016616819] [2021-02-19 17:42:42,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:42,375 INFO L87 Difference]: Start difference. First operand 85 states and 197 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) [2021-02-19 17:42:42,633 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 17:42:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:42,897 INFO L93 Difference]: Finished difference Result 105 states and 236 transitions. [2021-02-19 17:42:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:42,898 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 [2021-02-19 17:42:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:42,898 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:42:42,898 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:42:42,898 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:42:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:42:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2021-02-19 17:42:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.3448275862068964) internal successors, (204), 87 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 204 transitions. [2021-02-19 17:42:42,901 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 204 transitions. Word has length 14 [2021-02-19 17:42:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:42,901 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 204 transitions. [2021-02-19 17:42:42,901 INFO L481 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) [2021-02-19 17:42:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 204 transitions. [2021-02-19 17:42:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:42,901 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:42,901 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:43,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:43,102 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:43,102 INFO L82 PathProgramCache]: Analyzing trace with hash -390038521, now seen corresponding path program 44 times [2021-02-19 17:42:43,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:43,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023717938] [2021-02-19 17:42:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:43,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023717938] [2021-02-19 17:42:43,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170539777] [2021-02-19 17:42:43,256 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 [2021-02-19 17:42:43,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:43,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:43,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:43,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,585 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 [2021-02-19 17:42:43,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:43,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,593 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 [2021-02-19 17:42:43,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,611 INFO L628 ElimStorePlain]: treesize reduction 84, result has 11.6 percent of original size [2021-02-19 17:42:43,611 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:43,611 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-02-19 17:42:43,611 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-02-19 17:42:43,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:43,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:43,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:42:43,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025868515] [2021-02-19 17:42:43,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:42:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:42:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:43,626 INFO L87 Difference]: Start difference. First operand 88 states and 204 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) [2021-02-19 17:42:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:44,027 INFO L93 Difference]: Finished difference Result 149 states and 319 transitions. [2021-02-19 17:42:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:44,027 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 [2021-02-19 17:42:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:44,028 INFO L225 Difference]: With dead ends: 149 [2021-02-19 17:42:44,028 INFO L226 Difference]: Without dead ends: 146 [2021-02-19 17:42:44,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-02-19 17:42:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-02-19 17:42:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4242424242424243) internal successors, (240), 99 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 240 transitions. [2021-02-19 17:42:44,031 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 240 transitions. Word has length 14 [2021-02-19 17:42:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:44,031 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 240 transitions. [2021-02-19 17:42:44,031 INFO L481 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) [2021-02-19 17:42:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 240 transitions. [2021-02-19 17:42:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:44,031 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:44,031 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:44,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-02-19 17:42:44,242 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash 732600907, now seen corresponding path program 45 times [2021-02-19 17:42:44,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:44,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635476789] [2021-02-19 17:42:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:44,570 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 17:42:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:44,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635476789] [2021-02-19 17:42:44,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863285144] [2021-02-19 17:42:44,710 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 [2021-02-19 17:42:44,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:44,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:44,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:45,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:45,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:45,088 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 [2021-02-19 17:42:45,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:45,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:45,095 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 [2021-02-19 17:42:45,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,110 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-02-19 17:42:45,110 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:45,110 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-02-19 17:42:45,110 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-02-19 17:42:45,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:45,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:45,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:45,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310863749] [2021-02-19 17:42:45,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:45,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:45,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:45,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:45,138 INFO L87 Difference]: Start difference. First operand 100 states and 240 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) [2021-02-19 17:42:45,530 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-02-19 17:42:45,652 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 17:42:45,959 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-02-19 17:42:46,307 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-02-19 17:42:46,622 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2021-02-19 17:42:46,782 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-02-19 17:42:46,988 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-02-19 17:42:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:47,020 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2021-02-19 17:42:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:42:47,020 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 [2021-02-19 17:42:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:47,021 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:42:47,021 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:42:47,021 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:42:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:42:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-02-19 17:42:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.4134615384615383) internal successors, (251), 104 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 251 transitions. [2021-02-19 17:42:47,024 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 251 transitions. Word has length 14 [2021-02-19 17:42:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:47,024 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 251 transitions. [2021-02-19 17:42:47,024 INFO L481 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) [2021-02-19 17:42:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 251 transitions. [2021-02-19 17:42:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:47,025 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:47,025 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:47,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-02-19 17:42:47,241 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash -844740823, now seen corresponding path program 46 times [2021-02-19 17:42:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:47,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928898484] [2021-02-19 17:42:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:47,424 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 17:42:47,609 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-02-19 17:42:47,811 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-02-19 17:42:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:47,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928898484] [2021-02-19 17:42:47,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668930327] [2021-02-19 17:42:47,878 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 [2021-02-19 17:42:47,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:48,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:48,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:48,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:48,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:48,250 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 [2021-02-19 17:42:48,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:48,258 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 [2021-02-19 17:42:48,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:48,277 INFO L628 ElimStorePlain]: treesize reduction 84, result has 11.6 percent of original size [2021-02-19 17:42:48,277 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:48,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-02-19 17:42:48,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_45 vanished before elimination [2021-02-19 17:42:48,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:48,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:48,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:48,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:48,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670920331] [2021-02-19 17:42:48,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:48,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:48,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:48,307 INFO L87 Difference]: Start difference. First operand 105 states and 251 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) [2021-02-19 17:42:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:48,666 INFO L93 Difference]: Finished difference Result 129 states and 299 transitions. [2021-02-19 17:42:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:48,667 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 [2021-02-19 17:42:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:48,667 INFO L225 Difference]: With dead ends: 129 [2021-02-19 17:42:48,667 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 17:42:48,667 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 17:42:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2021-02-19 17:42:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.4134615384615383) internal successors, (251), 104 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 251 transitions. [2021-02-19 17:42:48,670 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 251 transitions. Word has length 14 [2021-02-19 17:42:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:48,670 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 251 transitions. [2021-02-19 17:42:48,670 INFO L481 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) [2021-02-19 17:42:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 251 transitions. [2021-02-19 17:42:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:48,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:48,670 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:48,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:48,874 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash -605098485, now seen corresponding path program 47 times [2021-02-19 17:42:48,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:48,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831536834] [2021-02-19 17:42:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:49,171 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-02-19 17:42:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831536834] [2021-02-19 17:42:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127114603] [2021-02-19 17:42:49,295 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 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 [2021-02-19 17:42:49,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:49,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:49,560 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:42:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:49,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:49,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,766 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 [2021-02-19 17:42:49,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,785 INFO L628 ElimStorePlain]: treesize reduction 111, result has 9.0 percent of original size [2021-02-19 17:42:49,785 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:49,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-02-19 17:42:49,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-02-19 17:42:49,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:49,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:49,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 17:42:49,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516480656] [2021-02-19 17:42:49,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:42:49,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:42:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:42:49,814 INFO L87 Difference]: Start difference. First operand 105 states and 251 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) [2021-02-19 17:42:50,122 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-02-19 17:42:50,280 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 17:42:50,517 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-02-19 17:42:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:50,609 INFO L93 Difference]: Finished difference Result 128 states and 290 transitions. [2021-02-19 17:42:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:50,609 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 [2021-02-19 17:42:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:50,610 INFO L225 Difference]: With dead ends: 128 [2021-02-19 17:42:50,610 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:42:50,610 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:42:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2021-02-19 17:42:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.4174757281553396) internal successors, (249), 103 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 249 transitions. [2021-02-19 17:42:50,613 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 249 transitions. Word has length 14 [2021-02-19 17:42:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:50,613 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 249 transitions. [2021-02-19 17:42:50,613 INFO L481 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) [2021-02-19 17:42:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 249 transitions. [2021-02-19 17:42:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:50,613 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:50,613 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:50,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-02-19 17:42:50,830 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -597368087, now seen corresponding path program 48 times [2021-02-19 17:42:50,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:50,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439777075] [2021-02-19 17:42:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:51,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439777075] [2021-02-19 17:42:51,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270694472] [2021-02-19 17:42:51,003 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 [2021-02-19 17:42:51,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:42:51,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:51,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:51,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:51,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:51,363 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 [2021-02-19 17:42:51,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:51,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:51,372 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 [2021-02-19 17:42:51,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:51,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:51,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:51,380 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 [2021-02-19 17:42:51,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:51,397 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:42:51,397 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:51,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:51,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-02-19 17:42:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:51,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:51,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:42:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131529271] [2021-02-19 17:42:51,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:42:51,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:42:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:51,422 INFO L87 Difference]: Start difference. First operand 104 states and 249 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) [2021-02-19 17:42:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:51,982 INFO L93 Difference]: Finished difference Result 172 states and 370 transitions. [2021-02-19 17:42:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:42:51,983 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 [2021-02-19 17:42:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:51,983 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:42:51,983 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:42:51,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:42:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-02-19 17:42:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.452830188679245) internal successors, (260), 106 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 260 transitions. [2021-02-19 17:42:51,986 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 260 transitions. Word has length 14 [2021-02-19 17:42:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:51,986 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 260 transitions. [2021-02-19 17:42:51,986 INFO L481 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) [2021-02-19 17:42:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 260 transitions. [2021-02-19 17:42:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:51,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:51,986 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:52,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-02-19 17:42:52,205 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1262043297, now seen corresponding path program 49 times [2021-02-19 17:42:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:52,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828708096] [2021-02-19 17:42:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:52,393 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 17:42:52,612 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-02-19 17:42:52,826 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-02-19 17:42:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:52,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828708096] [2021-02-19 17:42:52,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898172904] [2021-02-19 17:42:52,892 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 [2021-02-19 17:42:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:53,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,199 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 [2021-02-19 17:42:53,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:53,218 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-02-19 17:42:53,218 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-02-19 17:42:53,218 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-02-19 17:42:53,218 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:53,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:53,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:53,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:53,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990018397] [2021-02-19 17:42:53,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:53,244 INFO L87 Difference]: Start difference. First operand 107 states and 260 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) [2021-02-19 17:42:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:53,570 INFO L93 Difference]: Finished difference Result 124 states and 293 transitions. [2021-02-19 17:42:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:42:53,571 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 [2021-02-19 17:42:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:53,571 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:42:53,571 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:42:53,571 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:42:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2021-02-19 17:42:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.452830188679245) internal successors, (260), 106 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 260 transitions. [2021-02-19 17:42:53,573 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 260 transitions. Word has length 14 [2021-02-19 17:42:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:53,574 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 260 transitions. [2021-02-19 17:42:53,574 INFO L481 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) [2021-02-19 17:42:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 260 transitions. [2021-02-19 17:42:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:53,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:53,574 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:53,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:53,790 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1720196281, now seen corresponding path program 50 times [2021-02-19 17:42:53,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:53,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575774325] [2021-02-19 17:42:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:54,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575774325] [2021-02-19 17:42:54,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516069427] [2021-02-19 17:42:54,102 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 [2021-02-19 17:42:54,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:54,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:54,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:54,333 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:42:54,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:54,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:54,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,557 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 [2021-02-19 17:42:54,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,576 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-02-19 17:42:54,576 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:54,576 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-02-19 17:42:54,576 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-02-19 17:42:54,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-02-19 17:42:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:54,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:54,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:42:54,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945156772] [2021-02-19 17:42:54,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:54,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:54,603 INFO L87 Difference]: Start difference. First operand 107 states and 260 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) [2021-02-19 17:42:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:55,069 INFO L93 Difference]: Finished difference Result 134 states and 305 transitions. [2021-02-19 17:42:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:55,069 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 [2021-02-19 17:42:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:55,070 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:42:55,070 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:42:55,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:42:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2021-02-19 17:42:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.467289719626168) internal successors, (264), 107 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 264 transitions. [2021-02-19 17:42:55,073 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 264 transitions. Word has length 14 [2021-02-19 17:42:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:55,073 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 264 transitions. [2021-02-19 17:42:55,073 INFO L481 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) [2021-02-19 17:42:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 264 transitions. [2021-02-19 17:42:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:55,073 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:55,074 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:55,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:55,282 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1093096417, now seen corresponding path program 51 times [2021-02-19 17:42:55,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:55,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516042751] [2021-02-19 17:42:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:55,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516042751] [2021-02-19 17:42:55,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833724160] [2021-02-19 17:42:55,443 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 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 [2021-02-19 17:42:55,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:42:55,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:55,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:55,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,685 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 [2021-02-19 17:42:55,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:55,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,692 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 [2021-02-19 17:42:55,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:42:55,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,697 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 [2021-02-19 17:42:55,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,713 INFO L628 ElimStorePlain]: treesize reduction 68, result has 13.9 percent of original size [2021-02-19 17:42:55,713 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:55,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-02-19 17:42:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:55,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:55,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:42:55,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252215333] [2021-02-19 17:42:55,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:42:55,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:42:55,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:55,725 INFO L87 Difference]: Start difference. First operand 108 states and 264 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) [2021-02-19 17:42:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:56,076 INFO L93 Difference]: Finished difference Result 173 states and 387 transitions. [2021-02-19 17:42:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:56,077 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 [2021-02-19 17:42:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:56,078 INFO L225 Difference]: With dead ends: 173 [2021-02-19 17:42:56,078 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:42:56,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:42:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:42:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2021-02-19 17:42:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.5) internal successors, (275), 110 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 275 transitions. [2021-02-19 17:42:56,080 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 275 transitions. Word has length 14 [2021-02-19 17:42:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:56,081 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 275 transitions. [2021-02-19 17:42:56,081 INFO L481 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) [2021-02-19 17:42:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 275 transitions. [2021-02-19 17:42:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:56,081 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:56,081 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:56,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:56,290 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:56,290 INFO L82 PathProgramCache]: Analyzing trace with hash 351187309, now seen corresponding path program 52 times [2021-02-19 17:42:56,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:56,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462557406] [2021-02-19 17:42:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462557406] [2021-02-19 17:42:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756916709] [2021-02-19 17:42:56,360 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 [2021-02-19 17:42:56,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:56,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:42:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:56,479 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 [2021-02-19 17:42:56,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:56,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:56,483 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 [2021-02-19 17:42:56,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:56,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:42:56,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:56,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:56,490 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 [2021-02-19 17:42:56,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:56,493 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 7 treesize of output 5 [2021-02-19 17:42:56,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:56,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:56,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:56,522 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-02-19 17:42:56,522 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:56,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:56,523 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-02-19 17:42:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:56,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:56,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:42:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973873226] [2021-02-19 17:42:56,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:42:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:42:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:56,551 INFO L87 Difference]: Start difference. First operand 111 states and 275 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) [2021-02-19 17:42:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:56,850 INFO L93 Difference]: Finished difference Result 157 states and 374 transitions. [2021-02-19 17:42:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:42:56,850 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 [2021-02-19 17:42:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:56,851 INFO L225 Difference]: With dead ends: 157 [2021-02-19 17:42:56,851 INFO L226 Difference]: Without dead ends: 148 [2021-02-19 17:42:56,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-02-19 17:42:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 108. [2021-02-19 17:42:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.514018691588785) internal successors, (269), 107 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 269 transitions. [2021-02-19 17:42:56,853 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 269 transitions. Word has length 15 [2021-02-19 17:42:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:56,853 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 269 transitions. [2021-02-19 17:42:56,853 INFO L481 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) [2021-02-19 17:42:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 269 transitions. [2021-02-19 17:42:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:56,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:56,854 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:57,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-02-19 17:42:57,074 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1964128859, now seen corresponding path program 53 times [2021-02-19 17:42:57,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:57,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061724472] [2021-02-19 17:42:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:57,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061724472] [2021-02-19 17:42:57,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306468976] [2021-02-19 17:42:57,148 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 [2021-02-19 17:42:57,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:42:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:42:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:57,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,281 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 [2021-02-19 17:42:57,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:42:57,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,301 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-02-19 17:42:57,301 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:57,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,302 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-02-19 17:42:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:57,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:57,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:42:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943976721] [2021-02-19 17:42:57,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:42:57,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:42:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:57,322 INFO L87 Difference]: Start difference. First operand 108 states and 269 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) [2021-02-19 17:42:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:57,457 INFO L93 Difference]: Finished difference Result 157 states and 379 transitions. [2021-02-19 17:42:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:42:57,457 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 [2021-02-19 17:42:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:57,458 INFO L225 Difference]: With dead ends: 157 [2021-02-19 17:42:57,458 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:42:57,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:42:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:42:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2021-02-19 17:42:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.5185185185185186) internal successors, (272), 108 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 272 transitions. [2021-02-19 17:42:57,460 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 272 transitions. Word has length 15 [2021-02-19 17:42:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:57,460 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 272 transitions. [2021-02-19 17:42:57,460 INFO L481 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) [2021-02-19 17:42:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 272 transitions. [2021-02-19 17:42:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:57,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:57,461 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:57,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:57,670 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash -313196933, now seen corresponding path program 54 times [2021-02-19 17:42:57,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:57,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200890929] [2021-02-19 17:42:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:57,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200890929] [2021-02-19 17:42:57,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405870801] [2021-02-19 17:42:57,759 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) [2021-02-19 17:42:57,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:42:57,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:42:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:57,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,895 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 [2021-02-19 17:42:57,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,899 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 [2021-02-19 17:42:57,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,903 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 15 treesize of output 11 [2021-02-19 17:42:57,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:57,906 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 [2021-02-19 17:42:57,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:57,943 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:57,944 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:57,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:57,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:57,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:57,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:42:57,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323267176] [2021-02-19 17:42:57,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:57,998 INFO L87 Difference]: Start difference. First operand 109 states and 272 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) [2021-02-19 17:42:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:58,404 INFO L93 Difference]: Finished difference Result 202 states and 454 transitions. [2021-02-19 17:42:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:42:58,404 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 [2021-02-19 17:42:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:58,405 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:42:58,405 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:42:58,405 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:42:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:42:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 115. [2021-02-19 17:42:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5701754385964914) internal successors, (293), 114 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) [2021-02-19 17:42:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 293 transitions. [2021-02-19 17:42:58,408 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 293 transitions. Word has length 15 [2021-02-19 17:42:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:58,408 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 293 transitions. [2021-02-19 17:42:58,408 INFO L481 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) [2021-02-19 17:42:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 293 transitions. [2021-02-19 17:42:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:58,408 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:58,408 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:58,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-02-19 17:42:58,609 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 488419295, now seen corresponding path program 55 times [2021-02-19 17:42:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:58,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370345102] [2021-02-19 17:42:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:58,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370345102] [2021-02-19 17:42:58,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700457287] [2021-02-19 17:42:58,717 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 [2021-02-19 17:42:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:42:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,844 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 [2021-02-19 17:42:58,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,863 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 17 treesize of output 13 [2021-02-19 17:42:58,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,869 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 15 treesize of output 11 [2021-02-19 17:42:58,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:58,873 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 [2021-02-19 17:42:58,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,911 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:42:58,911 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:42:58,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:42:58,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:42:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:59,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:59,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:42:59,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432065482] [2021-02-19 17:42:59,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:59,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:59,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:59,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:59,006 INFO L87 Difference]: Start difference. First operand 115 states and 293 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) [2021-02-19 17:42:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:59,788 INFO L93 Difference]: Finished difference Result 215 states and 479 transitions. [2021-02-19 17:42:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:42:59,788 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 [2021-02-19 17:42:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:59,789 INFO L225 Difference]: With dead ends: 215 [2021-02-19 17:42:59,789 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:42:59,789 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:42:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:42:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 121. [2021-02-19 17:42:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.5833333333333335) internal successors, (310), 120 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 310 transitions. [2021-02-19 17:42:59,792 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 310 transitions. Word has length 15 [2021-02-19 17:42:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:59,792 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 310 transitions. [2021-02-19 17:42:59,792 INFO L481 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) [2021-02-19 17:42:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 310 transitions. [2021-02-19 17:42:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:59,793 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:59,793 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:00,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-02-19 17:43:00,006 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2088204295, now seen corresponding path program 56 times [2021-02-19 17:43:00,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:00,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071386741] [2021-02-19 17:43:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071386741] [2021-02-19 17:43:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630302644] [2021-02-19 17:43:00,087 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 [2021-02-19 17:43:00,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:00,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:00,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,198 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 17 treesize of output 13 [2021-02-19 17:43:00,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,202 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 [2021-02-19 17:43:00,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,205 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 [2021-02-19 17:43:00,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,243 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:00,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:00,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:00,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:00,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:00,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:00,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846271690] [2021-02-19 17:43:00,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:00,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:00,295 INFO L87 Difference]: Start difference. First operand 121 states and 310 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) [2021-02-19 17:43:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:00,731 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2021-02-19 17:43:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:00,731 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 [2021-02-19 17:43:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:00,732 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:43:00,732 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:43:00,732 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:43:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:43:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 121. [2021-02-19 17:43:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.566666666666667) internal successors, (308), 120 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 308 transitions. [2021-02-19 17:43:00,734 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 308 transitions. Word has length 15 [2021-02-19 17:43:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:00,735 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 308 transitions. [2021-02-19 17:43:00,735 INFO L481 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) [2021-02-19 17:43:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 308 transitions. [2021-02-19 17:43:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:00,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:00,735 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:00,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-02-19 17:43:00,935 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 496149693, now seen corresponding path program 57 times [2021-02-19 17:43:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292742691] [2021-02-19 17:43:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:01,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292742691] [2021-02-19 17:43:01,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934183134] [2021-02-19 17:43:01,011 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 [2021-02-19 17:43:01,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:01,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:01,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:01,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:01,158 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 [2021-02-19 17:43:01,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:01,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:01,161 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 16 treesize of output 12 [2021-02-19 17:43:01,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:01,187 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:01,187 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:01,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:01,188 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:01,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:01,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:01,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221468435] [2021-02-19 17:43:01,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:01,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:01,211 INFO L87 Difference]: Start difference. First operand 121 states and 308 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) [2021-02-19 17:43:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:01,512 INFO L93 Difference]: Finished difference Result 189 states and 453 transitions. [2021-02-19 17:43:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:01,513 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 [2021-02-19 17:43:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:01,513 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:43:01,513 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:43:01,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:43:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 123. [2021-02-19 17:43:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.5655737704918034) internal successors, (313), 122 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 313 transitions. [2021-02-19 17:43:01,516 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 313 transitions. Word has length 15 [2021-02-19 17:43:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:01,516 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 313 transitions. [2021-02-19 17:43:01,516 INFO L481 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) [2021-02-19 17:43:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 313 transitions. [2021-02-19 17:43:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:01,516 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:01,516 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:01,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:01,718 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash -993255303, now seen corresponding path program 58 times [2021-02-19 17:43:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:01,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668644603] [2021-02-19 17:43:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668644603] [2021-02-19 17:43:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003515623] [2021-02-19 17:43:01,801 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 [2021-02-19 17:43:01,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:01,956 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 15 treesize of output 11 [2021-02-19 17:43:01,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:01,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:01,959 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 [2021-02-19 17:43:01,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:01,985 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:01,985 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:01,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:01,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:02,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:02,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:02,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824036747] [2021-02-19 17:43:02,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:02,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:02,009 INFO L87 Difference]: Start difference. First operand 123 states and 313 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) [2021-02-19 17:43:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:02,131 INFO L93 Difference]: Finished difference Result 172 states and 423 transitions. [2021-02-19 17:43:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:02,131 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 [2021-02-19 17:43:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:02,132 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:43:02,132 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:43:02,132 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:02,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:43:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 123. [2021-02-19 17:43:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.5655737704918034) internal successors, (313), 122 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 313 transitions. [2021-02-19 17:43:02,134 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 313 transitions. Word has length 15 [2021-02-19 17:43:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:02,134 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 313 transitions. [2021-02-19 17:43:02,134 INFO L481 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) [2021-02-19 17:43:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 313 transitions. [2021-02-19 17:43:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:02,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:02,135 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:02,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 17:43:02,342 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1505045569, now seen corresponding path program 59 times [2021-02-19 17:43:02,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:02,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443765667] [2021-02-19 17:43:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443765667] [2021-02-19 17:43:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605930873] [2021-02-19 17:43:02,431 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 [2021-02-19 17:43:02,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:43:02,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:02,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:02,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:02,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:02,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:02,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:02,574 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:43:02,574 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:02,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:02,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:43:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:02,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:02,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:02,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268287549] [2021-02-19 17:43:02,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:02,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:02,598 INFO L87 Difference]: Start difference. First operand 123 states and 313 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) [2021-02-19 17:43:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:02,812 INFO L93 Difference]: Finished difference Result 207 states and 476 transitions. [2021-02-19 17:43:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:02,813 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 [2021-02-19 17:43:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:02,813 INFO L225 Difference]: With dead ends: 207 [2021-02-19 17:43:02,813 INFO L226 Difference]: Without dead ends: 207 [2021-02-19 17:43:02,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:43:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-02-19 17:43:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 134. [2021-02-19 17:43:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.661654135338346) internal successors, (354), 133 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 354 transitions. [2021-02-19 17:43:02,816 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 354 transitions. Word has length 15 [2021-02-19 17:43:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:02,816 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 354 transitions. [2021-02-19 17:43:02,816 INFO L481 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) [2021-02-19 17:43:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 354 transitions. [2021-02-19 17:43:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:02,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:02,817 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:03,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:03,031 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1870221019, now seen corresponding path program 60 times [2021-02-19 17:43:03,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:03,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222285331] [2021-02-19 17:43:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:03,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222285331] [2021-02-19 17:43:03,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252922354] [2021-02-19 17:43:03,117 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) [2021-02-19 17:43:03,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:03,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:03,255 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 8 treesize of output 6 [2021-02-19 17:43:03,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,259 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 [2021-02-19 17:43:03,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:03,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,267 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 17 treesize of output 13 [2021-02-19 17:43:03,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,271 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 [2021-02-19 17:43:03,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:03,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,311 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-02-19 17:43:03,312 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:03,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:03,312 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:43:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:03,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:03,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:03,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664402637] [2021-02-19 17:43:03,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:03,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:03,347 INFO L87 Difference]: Start difference. First operand 134 states and 354 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) [2021-02-19 17:43:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:03,666 INFO L93 Difference]: Finished difference Result 179 states and 420 transitions. [2021-02-19 17:43:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:43:03,666 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 [2021-02-19 17:43:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:03,667 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:43:03,667 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 17:43:03,667 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 17:43:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2021-02-19 17:43:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.6343283582089554) internal successors, (353), 134 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 353 transitions. [2021-02-19 17:43:03,669 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 353 transitions. Word has length 15 [2021-02-19 17:43:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:03,669 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 353 transitions. [2021-02-19 17:43:03,669 INFO L481 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) [2021-02-19 17:43:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 353 transitions. [2021-02-19 17:43:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:03,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:03,669 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:03,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:03,870 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1497315171, now seen corresponding path program 61 times [2021-02-19 17:43:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426847563] [2021-02-19 17:43:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:03,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426847563] [2021-02-19 17:43:03,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118130158] [2021-02-19 17:43:03,974 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 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 [2021-02-19 17:43:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:04,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,093 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 [2021-02-19 17:43:04,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,098 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 [2021-02-19 17:43:04,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,105 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 [2021-02-19 17:43:04,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,110 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 16 treesize of output 12 [2021-02-19 17:43:04,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,161 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:04,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:04,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:04,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:04,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:04,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:04,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459409648] [2021-02-19 17:43:04,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:04,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:04,231 INFO L87 Difference]: Start difference. First operand 135 states and 353 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) [2021-02-19 17:43:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:04,708 INFO L93 Difference]: Finished difference Result 234 states and 506 transitions. [2021-02-19 17:43:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:43:04,709 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 [2021-02-19 17:43:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:04,710 INFO L225 Difference]: With dead ends: 234 [2021-02-19 17:43:04,710 INFO L226 Difference]: Without dead ends: 233 [2021-02-19 17:43:04,710 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:43:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-02-19 17:43:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 139. [2021-02-19 17:43:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.6449275362318843) internal successors, (365), 138 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 365 transitions. [2021-02-19 17:43:04,712 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 365 transitions. Word has length 15 [2021-02-19 17:43:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:04,712 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 365 transitions. [2021-02-19 17:43:04,712 INFO L481 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) [2021-02-19 17:43:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 365 transitions. [2021-02-19 17:43:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:04,713 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:04,713 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:04,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-02-19 17:43:04,926 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash -695698943, now seen corresponding path program 62 times [2021-02-19 17:43:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:04,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390680310] [2021-02-19 17:43:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390680310] [2021-02-19 17:43:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100887979] [2021-02-19 17:43:05,012 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) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:05,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:05,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,122 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 [2021-02-19 17:43:05,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:05,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,127 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 [2021-02-19 17:43:05,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,132 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 [2021-02-19 17:43:05,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:05,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:05,136 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 16 treesize of output 12 [2021-02-19 17:43:05,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:05,179 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:05,179 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:05,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:05,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:05,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:05,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052001893] [2021-02-19 17:43:05,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:05,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:05,268 INFO L87 Difference]: Start difference. First operand 139 states and 365 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) [2021-02-19 17:43:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:05,821 INFO L93 Difference]: Finished difference Result 230 states and 501 transitions. [2021-02-19 17:43:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:43:05,821 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 [2021-02-19 17:43:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:05,822 INFO L225 Difference]: With dead ends: 230 [2021-02-19 17:43:05,822 INFO L226 Difference]: Without dead ends: 226 [2021-02-19 17:43:05,822 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:43:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-02-19 17:43:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 141. [2021-02-19 17:43:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.6285714285714286) internal successors, (368), 140 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 368 transitions. [2021-02-19 17:43:05,827 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 368 transitions. Word has length 15 [2021-02-19 17:43:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:05,827 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 368 transitions. [2021-02-19 17:43:05,827 INFO L481 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) [2021-02-19 17:43:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 368 transitions. [2021-02-19 17:43:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:05,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:05,827 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:06,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-02-19 17:43:06,042 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1022644763, now seen corresponding path program 63 times [2021-02-19 17:43:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:06,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848486341] [2021-02-19 17:43:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:06,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848486341] [2021-02-19 17:43:06,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031170047] [2021-02-19 17:43:06,172 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 [2021-02-19 17:43:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:43:06,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,276 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 [2021-02-19 17:43:06,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:06,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,289 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 [2021-02-19 17:43:06,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,293 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 [2021-02-19 17:43:06,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,330 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:06,330 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:06,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:06,330 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:06,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:06,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057294589] [2021-02-19 17:43:06,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:06,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:06,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:06,383 INFO L87 Difference]: Start difference. First operand 141 states and 368 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) [2021-02-19 17:43:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:06,788 INFO L93 Difference]: Finished difference Result 216 states and 504 transitions. [2021-02-19 17:43:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:06,788 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 [2021-02-19 17:43:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:06,789 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:43:06,789 INFO L226 Difference]: Without dead ends: 216 [2021-02-19 17:43:06,789 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:43:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-19 17:43:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2021-02-19 17:43:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.673469387755102) internal successors, (393), 147 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 393 transitions. [2021-02-19 17:43:06,792 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 393 transitions. Word has length 15 [2021-02-19 17:43:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:06,792 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 393 transitions. [2021-02-19 17:43:06,792 INFO L481 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) [2021-02-19 17:43:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 393 transitions. [2021-02-19 17:43:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:06,793 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:06,793 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:07,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:07,006 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1379198981, now seen corresponding path program 64 times [2021-02-19 17:43:07,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:07,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029686708] [2021-02-19 17:43:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:07,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029686708] [2021-02-19 17:43:07,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009627875] [2021-02-19 17:43:07,096 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) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:07,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:07,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,205 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 [2021-02-19 17:43:07,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,210 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 17 treesize of output 13 [2021-02-19 17:43:07,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,215 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 [2021-02-19 17:43:07,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,220 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 [2021-02-19 17:43:07,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,264 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:07,265 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:07,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:07,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:07,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:07,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:07,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841878526] [2021-02-19 17:43:07,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:07,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:07,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:07,343 INFO L87 Difference]: Start difference. First operand 148 states and 393 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) [2021-02-19 17:43:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:07,996 INFO L93 Difference]: Finished difference Result 222 states and 510 transitions. [2021-02-19 17:43:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:43:07,996 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 [2021-02-19 17:43:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:07,997 INFO L225 Difference]: With dead ends: 222 [2021-02-19 17:43:07,997 INFO L226 Difference]: Without dead ends: 218 [2021-02-19 17:43:07,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:43:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-02-19 17:43:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 154. [2021-02-19 17:43:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.6666666666666665) internal successors, (408), 153 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) [2021-02-19 17:43:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 408 transitions. [2021-02-19 17:43:08,000 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 408 transitions. Word has length 15 [2021-02-19 17:43:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:08,000 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 408 transitions. [2021-02-19 17:43:08,000 INFO L481 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) [2021-02-19 17:43:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 408 transitions. [2021-02-19 17:43:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:08,001 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:08,001 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:08,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-02-19 17:43:08,222 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 349848353, now seen corresponding path program 65 times [2021-02-19 17:43:08,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:08,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56448768] [2021-02-19 17:43:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:08,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56448768] [2021-02-19 17:43:08,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386240927] [2021-02-19 17:43:08,290 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 [2021-02-19 17:43:08,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:08,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:08,424 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 8 treesize of output 6 [2021-02-19 17:43:08,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:08,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:08,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:08,429 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 [2021-02-19 17:43:08,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:08,433 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 7 treesize of output 5 [2021-02-19 17:43:08,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:08,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:08,439 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 [2021-02-19 17:43:08,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:08,444 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 7 treesize of output 5 [2021-02-19 17:43:08,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:08,447 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 8 treesize of output 6 [2021-02-19 17:43:08,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:08,481 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:08,482 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:08,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:08,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:08,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:08,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402335923] [2021-02-19 17:43:08,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:08,511 INFO L87 Difference]: Start difference. First operand 154 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) [2021-02-19 17:43:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:08,946 INFO L93 Difference]: Finished difference Result 191 states and 461 transitions. [2021-02-19 17:43:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:43:08,947 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 [2021-02-19 17:43:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:08,947 INFO L225 Difference]: With dead ends: 191 [2021-02-19 17:43:08,947 INFO L226 Difference]: Without dead ends: 183 [2021-02-19 17:43:08,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-02-19 17:43:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-02-19 17:43:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.638709677419355) internal successors, (409), 155 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) [2021-02-19 17:43:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 409 transitions. [2021-02-19 17:43:08,950 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 409 transitions. Word has length 15 [2021-02-19 17:43:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:08,950 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 409 transitions. [2021-02-19 17:43:08,950 INFO L481 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) [2021-02-19 17:43:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 409 transitions. [2021-02-19 17:43:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:08,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:08,951 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:09,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:09,165 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2117593755, now seen corresponding path program 66 times [2021-02-19 17:43:09,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:09,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731334525] [2021-02-19 17:43:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:09,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731334525] [2021-02-19 17:43:09,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163337842] [2021-02-19 17:43:09,232 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 [2021-02-19 17:43:09,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:43:09,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:09,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:09,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:09,359 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 [2021-02-19 17:43:09,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:09,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:09,363 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 [2021-02-19 17:43:09,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:09,388 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:09,389 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:09,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:09,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:09,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:09,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:09,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047015681] [2021-02-19 17:43:09,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:09,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:09,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:09,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:09,423 INFO L87 Difference]: Start difference. First operand 156 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) [2021-02-19 17:43:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:09,675 INFO L93 Difference]: Finished difference Result 235 states and 552 transitions. [2021-02-19 17:43:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:09,676 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 [2021-02-19 17:43:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:09,676 INFO L225 Difference]: With dead ends: 235 [2021-02-19 17:43:09,676 INFO L226 Difference]: Without dead ends: 235 [2021-02-19 17:43:09,677 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:43:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-19 17:43:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2021-02-19 17:43:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.6540880503144653) internal successors, (422), 159 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 422 transitions. [2021-02-19 17:43:09,679 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 422 transitions. Word has length 15 [2021-02-19 17:43:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:09,679 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 422 transitions. [2021-02-19 17:43:09,679 INFO L481 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) [2021-02-19 17:43:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 422 transitions. [2021-02-19 17:43:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:09,679 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:09,679 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:09,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-02-19 17:43:09,880 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1913634787, now seen corresponding path program 67 times [2021-02-19 17:43:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:09,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366951667] [2021-02-19 17:43:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:09,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366951667] [2021-02-19 17:43:09,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678392314] [2021-02-19 17:43:09,961 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 [2021-02-19 17:43:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,077 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 [2021-02-19 17:43:10,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,081 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 17 treesize of output 13 [2021-02-19 17:43:10,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,085 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 [2021-02-19 17:43:10,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,089 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 [2021-02-19 17:43:10,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,127 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:10,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:10,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:10,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:10,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:10,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:10,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658303926] [2021-02-19 17:43:10,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:10,182 INFO L87 Difference]: Start difference. First operand 160 states and 422 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) [2021-02-19 17:43:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:10,394 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2021-02-19 17:43:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:43:10,395 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 [2021-02-19 17:43:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:10,395 INFO L225 Difference]: With dead ends: 233 [2021-02-19 17:43:10,395 INFO L226 Difference]: Without dead ends: 233 [2021-02-19 17:43:10,395 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:43:10,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-02-19 17:43:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 166. [2021-02-19 17:43:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.696969696969697) internal successors, (445), 165 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 445 transitions. [2021-02-19 17:43:10,398 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 445 transitions. Word has length 15 [2021-02-19 17:43:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:10,398 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 445 transitions. [2021-02-19 17:43:10,398 INFO L481 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) [2021-02-19 17:43:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 445 transitions. [2021-02-19 17:43:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:10,398 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:10,398 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:10,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:10,599 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1112018559, now seen corresponding path program 68 times [2021-02-19 17:43:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:10,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806307063] [2021-02-19 17:43:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:10,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806307063] [2021-02-19 17:43:10,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992747855] [2021-02-19 17:43:10,681 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 [2021-02-19 17:43:10,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:10,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:10,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:10,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:10,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,799 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 15 treesize of output 11 [2021-02-19 17:43:10,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:10,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,840 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:10,840 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:10,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:10,841 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:10,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:10,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:10,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353991936] [2021-02-19 17:43:10,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:10,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:10,916 INFO L87 Difference]: Start difference. First operand 166 states and 445 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) [2021-02-19 17:43:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:11,533 INFO L93 Difference]: Finished difference Result 232 states and 547 transitions. [2021-02-19 17:43:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:43:11,533 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 [2021-02-19 17:43:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:11,534 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:43:11,534 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:43:11,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:43:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:43:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-02-19 17:43:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.688622754491018) internal successors, (449), 167 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 449 transitions. [2021-02-19 17:43:11,540 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 449 transitions. Word has length 15 [2021-02-19 17:43:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:11,540 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 449 transitions. [2021-02-19 17:43:11,540 INFO L481 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) [2021-02-19 17:43:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 449 transitions. [2021-02-19 17:43:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:11,540 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:11,540 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:11,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:11,741 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 606325147, now seen corresponding path program 69 times [2021-02-19 17:43:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:11,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195508190] [2021-02-19 17:43:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195508190] [2021-02-19 17:43:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704699619] [2021-02-19 17:43:11,819 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 [2021-02-19 17:43:11,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:43:11,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:43:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,927 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 [2021-02-19 17:43:11,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,931 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 17 treesize of output 13 [2021-02-19 17:43:11,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,936 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 [2021-02-19 17:43:11,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,950 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 16 treesize of output 12 [2021-02-19 17:43:11,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,989 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:11,990 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:11,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:11,990 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:12,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:12,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522646958] [2021-02-19 17:43:12,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:12,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:12,042 INFO L87 Difference]: Start difference. First operand 168 states and 449 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) [2021-02-19 17:43:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:12,393 INFO L93 Difference]: Finished difference Result 219 states and 532 transitions. [2021-02-19 17:43:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:12,393 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 [2021-02-19 17:43:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:12,394 INFO L225 Difference]: With dead ends: 219 [2021-02-19 17:43:12,394 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:43:12,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:43:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:43:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 164. [2021-02-19 17:43:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.6503067484662575) internal successors, (432), 163 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 432 transitions. [2021-02-19 17:43:12,396 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 432 transitions. Word has length 15 [2021-02-19 17:43:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:12,396 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 432 transitions. [2021-02-19 17:43:12,396 INFO L481 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) [2021-02-19 17:43:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 432 transitions. [2021-02-19 17:43:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:12,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:12,397 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:12,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:12,597 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:12,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1104288161, now seen corresponding path program 70 times [2021-02-19 17:43:12,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:12,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996722112] [2021-02-19 17:43:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:12,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996722112] [2021-02-19 17:43:12,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360563200] [2021-02-19 17:43:12,671 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 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 [2021-02-19 17:43:12,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:12,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:12,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:12,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:12,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:12,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,814 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 16 treesize of output 12 [2021-02-19 17:43:12,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:12,839 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:12,839 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:12,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:12,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:12,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:12,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:12,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351065652] [2021-02-19 17:43:12,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:12,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:12,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:12,863 INFO L87 Difference]: Start difference. First operand 164 states and 432 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) [2021-02-19 17:43:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:13,158 INFO L93 Difference]: Finished difference Result 202 states and 508 transitions. [2021-02-19 17:43:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:13,159 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 [2021-02-19 17:43:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:13,159 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:43:13,159 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:43:13,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:43:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2021-02-19 17:43:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.6503067484662575) internal successors, (432), 163 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 432 transitions. [2021-02-19 17:43:13,162 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 432 transitions. Word has length 15 [2021-02-19 17:43:13,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:13,162 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 432 transitions. [2021-02-19 17:43:13,162 INFO L481 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) [2021-02-19 17:43:13,162 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 432 transitions. [2021-02-19 17:43:13,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:13,163 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:13,163 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:13,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-02-19 17:43:13,374 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1701274139, now seen corresponding path program 71 times [2021-02-19 17:43:13,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:13,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938010009] [2021-02-19 17:43:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:13,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938010009] [2021-02-19 17:43:13,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366852160] [2021-02-19 17:43:13,451 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 [2021-02-19 17:43:13,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:13,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,611 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 [2021-02-19 17:43:13,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,617 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 16 treesize of output 12 [2021-02-19 17:43:13,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,642 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:13,642 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:13,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,643 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:13,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:13,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:13,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467408006] [2021-02-19 17:43:13,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:13,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:13,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:13,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:13,666 INFO L87 Difference]: Start difference. First operand 164 states and 432 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) [2021-02-19 17:43:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:13,801 INFO L93 Difference]: Finished difference Result 193 states and 490 transitions. [2021-02-19 17:43:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:43:13,802 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 [2021-02-19 17:43:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:13,803 INFO L225 Difference]: With dead ends: 193 [2021-02-19 17:43:13,803 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:43:13,803 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:43:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 165. [2021-02-19 17:43:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.652439024390244) internal successors, (435), 164 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 435 transitions. [2021-02-19 17:43:13,806 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 435 transitions. Word has length 15 [2021-02-19 17:43:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:13,806 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 435 transitions. [2021-02-19 17:43:13,806 INFO L481 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) [2021-02-19 17:43:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 435 transitions. [2021-02-19 17:43:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:13,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:13,807 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:14,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-02-19 17:43:14,028 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash 202352379, now seen corresponding path program 72 times [2021-02-19 17:43:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:14,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521545427] [2021-02-19 17:43:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521545427] [2021-02-19 17:43:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352229435] [2021-02-19 17:43:14,099 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 [2021-02-19 17:43:14,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:14,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:14,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:14,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:14,228 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 15 treesize of output 11 [2021-02-19 17:43:14,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:14,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:14,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,253 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:43:14,253 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:14,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,254 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:43:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:14,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:14,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254780265] [2021-02-19 17:43:14,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:14,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:14,278 INFO L87 Difference]: Start difference. First operand 165 states and 435 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) [2021-02-19 17:43:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:14,474 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-02-19 17:43:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:14,474 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 [2021-02-19 17:43:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:14,475 INFO L225 Difference]: With dead ends: 241 [2021-02-19 17:43:14,475 INFO L226 Difference]: Without dead ends: 241 [2021-02-19 17:43:14,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-02-19 17:43:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 179. [2021-02-19 17:43:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.691011235955056) internal successors, (479), 178 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 479 transitions. [2021-02-19 17:43:14,479 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 479 transitions. Word has length 15 [2021-02-19 17:43:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:14,479 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 479 transitions. [2021-02-19 17:43:14,479 INFO L481 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) [2021-02-19 17:43:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 479 transitions. [2021-02-19 17:43:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:14,479 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:14,479 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:14,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:14,694 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1756401503, now seen corresponding path program 73 times [2021-02-19 17:43:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:14,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75664065] [2021-02-19 17:43:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75664065] [2021-02-19 17:43:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285680437] [2021-02-19 17:43:14,779 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 [2021-02-19 17:43:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:14,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:14,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,911 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 [2021-02-19 17:43:14,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:14,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:14,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:14,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:14,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:14,925 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 [2021-02-19 17:43:14,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:14,962 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-02-19 17:43:14,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:14,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:14,963 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:43:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:15,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:15,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:15,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747430219] [2021-02-19 17:43:15,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:15,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:15,002 INFO L87 Difference]: Start difference. First operand 179 states and 479 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) [2021-02-19 17:43:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:15,363 INFO L93 Difference]: Finished difference Result 228 states and 552 transitions. [2021-02-19 17:43:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:43:15,363 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 [2021-02-19 17:43:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:15,364 INFO L225 Difference]: With dead ends: 228 [2021-02-19 17:43:15,364 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:43:15,364 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:43:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-02-19 17:43:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.6864864864864866) internal successors, (497), 185 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 497 transitions. [2021-02-19 17:43:15,367 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 497 transitions. Word has length 15 [2021-02-19 17:43:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:15,367 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 497 transitions. [2021-02-19 17:43:15,367 INFO L481 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) [2021-02-19 17:43:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 497 transitions. [2021-02-19 17:43:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:15,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:15,368 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:15,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable526 [2021-02-19 17:43:15,574 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 441994717, now seen corresponding path program 74 times [2021-02-19 17:43:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:15,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988345476] [2021-02-19 17:43:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:15,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988345476] [2021-02-19 17:43:15,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381272458] [2021-02-19 17:43:15,651 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) [2021-02-19 17:43:15,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:15,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:15,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:15,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:15,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:15,803 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 15 treesize of output 11 [2021-02-19 17:43:15,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:15,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:15,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:15,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:15,827 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:43:15,827 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:15,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:15,828 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:43:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:15,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:15,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:15,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971906974] [2021-02-19 17:43:15,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:15,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:15,852 INFO L87 Difference]: Start difference. First operand 186 states and 497 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) [2021-02-19 17:43:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:16,320 INFO L93 Difference]: Finished difference Result 253 states and 600 transitions. [2021-02-19 17:43:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:43:16,320 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 [2021-02-19 17:43:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:16,321 INFO L225 Difference]: With dead ends: 253 [2021-02-19 17:43:16,321 INFO L226 Difference]: Without dead ends: 253 [2021-02-19 17:43:16,321 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:43:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-02-19 17:43:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 182. [2021-02-19 17:43:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.701657458563536) internal successors, (489), 181 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 489 transitions. [2021-02-19 17:43:16,324 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 489 transitions. Word has length 15 [2021-02-19 17:43:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:16,324 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 489 transitions. [2021-02-19 17:43:16,324 INFO L481 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) [2021-02-19 17:43:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 489 transitions. [2021-02-19 17:43:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:16,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:16,324 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:16,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-02-19 17:43:16,525 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash -477705991, now seen corresponding path program 75 times [2021-02-19 17:43:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:16,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310846770] [2021-02-19 17:43:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:16,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310846770] [2021-02-19 17:43:16,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817932825] [2021-02-19 17:43:16,606 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 [2021-02-19 17:43:16,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:43:16,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:16,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:16,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,744 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 [2021-02-19 17:43:16,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:16,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:16,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,756 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 [2021-02-19 17:43:16,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,760 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 [2021-02-19 17:43:16,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,797 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-02-19 17:43:16,797 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:16,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:16,798 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:43:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:16,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:16,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:16,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085096278] [2021-02-19 17:43:16,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:16,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:16,833 INFO L87 Difference]: Start difference. First operand 182 states and 489 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) [2021-02-19 17:43:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:17,139 INFO L93 Difference]: Finished difference Result 221 states and 541 transitions. [2021-02-19 17:43:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:17,140 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 [2021-02-19 17:43:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:17,140 INFO L225 Difference]: With dead ends: 221 [2021-02-19 17:43:17,140 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:43:17,140 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:43:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 182. [2021-02-19 17:43:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.696132596685083) internal successors, (488), 181 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 488 transitions. [2021-02-19 17:43:17,143 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 488 transitions. Word has length 15 [2021-02-19 17:43:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:17,144 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 488 transitions. [2021-02-19 17:43:17,144 INFO L481 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) [2021-02-19 17:43:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 488 transitions. [2021-02-19 17:43:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:17,144 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:17,144 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:17,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:17,354 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash 449725115, now seen corresponding path program 76 times [2021-02-19 17:43:17,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:17,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964522384] [2021-02-19 17:43:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:17,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964522384] [2021-02-19 17:43:17,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311793948] [2021-02-19 17:43:17,442 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 [2021-02-19 17:43:17,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:17,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,560 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 16 treesize of output 12 [2021-02-19 17:43:17,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,566 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 17 treesize of output 13 [2021-02-19 17:43:17,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:17,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,575 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 [2021-02-19 17:43:17,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,614 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:17,614 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:17,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:17,615 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:17,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:17,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:17,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030603073] [2021-02-19 17:43:17,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:17,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:17,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:17,681 INFO L87 Difference]: Start difference. First operand 182 states and 488 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) [2021-02-19 17:43:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:18,065 INFO L93 Difference]: Finished difference Result 257 states and 587 transitions. [2021-02-19 17:43:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:18,066 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 [2021-02-19 17:43:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:18,067 INFO L225 Difference]: With dead ends: 257 [2021-02-19 17:43:18,067 INFO L226 Difference]: Without dead ends: 257 [2021-02-19 17:43:18,067 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-19 17:43:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2021-02-19 17:43:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.6685714285714286) internal successors, (467), 175 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 467 transitions. [2021-02-19 17:43:18,069 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 467 transitions. Word has length 15 [2021-02-19 17:43:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:18,069 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 467 transitions. [2021-02-19 17:43:18,069 INFO L481 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) [2021-02-19 17:43:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 467 transitions. [2021-02-19 17:43:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:18,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:18,070 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:18,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:18,270 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1251341343, now seen corresponding path program 77 times [2021-02-19 17:43:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:18,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290850304] [2021-02-19 17:43:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:18,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290850304] [2021-02-19 17:43:18,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568200212] [2021-02-19 17:43:18,377 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 [2021-02-19 17:43:18,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:18,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:18,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,518 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 16 treesize of output 12 [2021-02-19 17:43:18,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:18,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,529 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 [2021-02-19 17:43:18,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,533 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 [2021-02-19 17:43:18,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,580 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:18,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:18,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:18,581 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:18,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:18,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:18,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541921660] [2021-02-19 17:43:18,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:18,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:18,681 INFO L87 Difference]: Start difference. First operand 176 states and 467 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) [2021-02-19 17:43:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:19,031 INFO L93 Difference]: Finished difference Result 234 states and 556 transitions. [2021-02-19 17:43:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:19,031 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 [2021-02-19 17:43:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:19,032 INFO L225 Difference]: With dead ends: 234 [2021-02-19 17:43:19,032 INFO L226 Difference]: Without dead ends: 231 [2021-02-19 17:43:19,032 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-02-19 17:43:19,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2021-02-19 17:43:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.657142857142857) internal successors, (465), 175 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 465 transitions. [2021-02-19 17:43:19,035 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 465 transitions. Word has length 15 [2021-02-19 17:43:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:19,035 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 465 transitions. [2021-02-19 17:43:19,035 INFO L481 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) [2021-02-19 17:43:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 465 transitions. [2021-02-19 17:43:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:19,035 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:19,035 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:19,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-02-19 17:43:19,238 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1325282247, now seen corresponding path program 78 times [2021-02-19 17:43:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:19,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249722118] [2021-02-19 17:43:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:19,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249722118] [2021-02-19 17:43:19,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916479994] [2021-02-19 17:43:19,326 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 [2021-02-19 17:43:19,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:19,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:19,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:19,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:19,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:19,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,466 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 [2021-02-19 17:43:19,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,470 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 15 treesize of output 11 [2021-02-19 17:43:19,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,473 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 16 treesize of output 12 [2021-02-19 17:43:19,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,512 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:19,512 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:19,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:19,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:19,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:19,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:19,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440442073] [2021-02-19 17:43:19,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:19,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:19,566 INFO L87 Difference]: Start difference. First operand 176 states and 465 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) [2021-02-19 17:43:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:19,811 INFO L93 Difference]: Finished difference Result 230 states and 548 transitions. [2021-02-19 17:43:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:43:19,811 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 [2021-02-19 17:43:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:19,812 INFO L225 Difference]: With dead ends: 230 [2021-02-19 17:43:19,812 INFO L226 Difference]: Without dead ends: 230 [2021-02-19 17:43:19,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-02-19 17:43:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 176. [2021-02-19 17:43:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.657142857142857) internal successors, (465), 175 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 465 transitions. [2021-02-19 17:43:19,815 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 465 transitions. Word has length 15 [2021-02-19 17:43:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:19,815 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 465 transitions. [2021-02-19 17:43:19,815 INFO L481 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) [2021-02-19 17:43:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 465 transitions. [2021-02-19 17:43:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:19,815 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:19,815 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:20,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-02-19 17:43:20,016 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash 33405499, now seen corresponding path program 79 times [2021-02-19 17:43:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:20,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556898185] [2021-02-19 17:43:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556898185] [2021-02-19 17:43:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340093392] [2021-02-19 17:43:20,094 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 [2021-02-19 17:43:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,214 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 [2021-02-19 17:43:20,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,220 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 17 treesize of output 13 [2021-02-19 17:43:20,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,225 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 15 treesize of output 11 [2021-02-19 17:43:20,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,229 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 16 treesize of output 12 [2021-02-19 17:43:20,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,274 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:20,275 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:20,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:20,275 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:20,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:20,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859168150] [2021-02-19 17:43:20,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:20,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:20,346 INFO L87 Difference]: Start difference. First operand 176 states and 465 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) [2021-02-19 17:43:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:20,606 INFO L93 Difference]: Finished difference Result 267 states and 614 transitions. [2021-02-19 17:43:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:20,607 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 [2021-02-19 17:43:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:20,608 INFO L225 Difference]: With dead ends: 267 [2021-02-19 17:43:20,608 INFO L226 Difference]: Without dead ends: 267 [2021-02-19 17:43:20,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:43:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-19 17:43:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 184. [2021-02-19 17:43:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.699453551912568) internal successors, (494), 183 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 494 transitions. [2021-02-19 17:43:20,611 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 494 transitions. Word has length 15 [2021-02-19 17:43:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:20,611 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 494 transitions. [2021-02-19 17:43:20,611 INFO L481 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) [2021-02-19 17:43:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 494 transitions. [2021-02-19 17:43:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:20,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:20,612 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:20,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-02-19 17:43:20,822 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash 835021727, now seen corresponding path program 80 times [2021-02-19 17:43:20,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:20,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037070013] [2021-02-19 17:43:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:20,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037070013] [2021-02-19 17:43:20,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296079752] [2021-02-19 17:43:20,887 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 [2021-02-19 17:43:20,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:20,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,986 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 16 treesize of output 12 [2021-02-19 17:43:20,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,990 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 17 treesize of output 13 [2021-02-19 17:43:20,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,995 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 15 treesize of output 11 [2021-02-19 17:43:20,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:20,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:20,998 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 [2021-02-19 17:43:20,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,037 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:21,037 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:21,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:21,038 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:21,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:21,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:21,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707652101] [2021-02-19 17:43:21,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:21,114 INFO L87 Difference]: Start difference. First operand 184 states and 494 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) [2021-02-19 17:43:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:21,522 INFO L93 Difference]: Finished difference Result 250 states and 588 transitions. [2021-02-19 17:43:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:43:21,522 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 [2021-02-19 17:43:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:21,523 INFO L225 Difference]: With dead ends: 250 [2021-02-19 17:43:21,523 INFO L226 Difference]: Without dead ends: 244 [2021-02-19 17:43:21,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-02-19 17:43:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 182. [2021-02-19 17:43:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.6629834254143647) internal successors, (482), 181 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 482 transitions. [2021-02-19 17:43:21,526 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 482 transitions. Word has length 15 [2021-02-19 17:43:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:21,526 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 482 transitions. [2021-02-19 17:43:21,526 INFO L481 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) [2021-02-19 17:43:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 482 transitions. [2021-02-19 17:43:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:21,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:21,526 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:21,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-02-19 17:43:21,727 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1741601863, now seen corresponding path program 81 times [2021-02-19 17:43:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:21,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118258269] [2021-02-19 17:43:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:21,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118258269] [2021-02-19 17:43:21,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504904521] [2021-02-19 17:43:21,794 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 [2021-02-19 17:43:21,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:21,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:21,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,898 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 [2021-02-19 17:43:21,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,911 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 [2021-02-19 17:43:21,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,917 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 15 treesize of output 11 [2021-02-19 17:43:21,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,922 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 16 treesize of output 12 [2021-02-19 17:43:21,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,975 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:21,975 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:21,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:21,976 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:22,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:22,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:22,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361703579] [2021-02-19 17:43:22,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:22,032 INFO L87 Difference]: Start difference. First operand 182 states and 482 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) [2021-02-19 17:43:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:22,279 INFO L93 Difference]: Finished difference Result 243 states and 579 transitions. [2021-02-19 17:43:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:43:22,279 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 [2021-02-19 17:43:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:22,280 INFO L225 Difference]: With dead ends: 243 [2021-02-19 17:43:22,280 INFO L226 Difference]: Without dead ends: 243 [2021-02-19 17:43:22,280 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:43:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-02-19 17:43:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 181. [2021-02-19 17:43:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.661111111111111) internal successors, (479), 180 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 479 transitions. [2021-02-19 17:43:22,283 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 479 transitions. Word has length 15 [2021-02-19 17:43:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:22,283 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 479 transitions. [2021-02-19 17:43:22,283 INFO L481 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) [2021-02-19 17:43:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 479 transitions. [2021-02-19 17:43:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:22,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:22,283 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:22,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:22,484 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:22,485 INFO L82 PathProgramCache]: Analyzing trace with hash 842752125, now seen corresponding path program 82 times [2021-02-19 17:43:22,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:22,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181604731] [2021-02-19 17:43:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:22,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181604731] [2021-02-19 17:43:22,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108195222] [2021-02-19 17:43:22,559 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 [2021-02-19 17:43:22,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:22,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:22,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:22,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,723 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 16 treesize of output 12 [2021-02-19 17:43:22,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,728 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 [2021-02-19 17:43:22,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,762 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:22,762 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:22,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:22,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:22,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:22,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023419012] [2021-02-19 17:43:22,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:22,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:22,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:22,793 INFO L87 Difference]: Start difference. First operand 181 states and 479 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) [2021-02-19 17:43:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:22,966 INFO L93 Difference]: Finished difference Result 248 states and 588 transitions. [2021-02-19 17:43:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:43:22,966 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 [2021-02-19 17:43:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:22,967 INFO L225 Difference]: With dead ends: 248 [2021-02-19 17:43:22,967 INFO L226 Difference]: Without dead ends: 248 [2021-02-19 17:43:22,967 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-19 17:43:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2021-02-19 17:43:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.6685082872928176) internal successors, (483), 181 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 483 transitions. [2021-02-19 17:43:22,970 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 483 transitions. Word has length 15 [2021-02-19 17:43:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:22,970 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 483 transitions. [2021-02-19 17:43:22,970 INFO L481 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) [2021-02-19 17:43:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 483 transitions. [2021-02-19 17:43:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:22,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:22,971 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:23,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-02-19 17:43:23,190 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash 12399291, now seen corresponding path program 83 times [2021-02-19 17:43:23,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:23,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323382112] [2021-02-19 17:43:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323382112] [2021-02-19 17:43:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728487289] [2021-02-19 17:43:23,267 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 [2021-02-19 17:43:23,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:43:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:23,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,383 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 [2021-02-19 17:43:23,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,387 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 [2021-02-19 17:43:23,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,392 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 15 treesize of output 11 [2021-02-19 17:43:23,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,395 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 16 treesize of output 12 [2021-02-19 17:43:23,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,434 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:23,434 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:23,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:23,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:23,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:23,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:23,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748139145] [2021-02-19 17:43:23,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:23,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:23,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:23,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:23,498 INFO L87 Difference]: Start difference. First operand 182 states and 483 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) [2021-02-19 17:43:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:23,771 INFO L93 Difference]: Finished difference Result 280 states and 659 transitions. [2021-02-19 17:43:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:23,772 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 [2021-02-19 17:43:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:23,773 INFO L225 Difference]: With dead ends: 280 [2021-02-19 17:43:23,773 INFO L226 Difference]: Without dead ends: 280 [2021-02-19 17:43:23,773 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-02-19 17:43:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 195. [2021-02-19 17:43:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.7268041237113403) internal successors, (529), 194 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 529 transitions. [2021-02-19 17:43:23,776 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 529 transitions. Word has length 15 [2021-02-19 17:43:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:23,776 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 529 transitions. [2021-02-19 17:43:23,776 INFO L481 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) [2021-02-19 17:43:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 529 transitions. [2021-02-19 17:43:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:23,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:23,777 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:23,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-02-19 17:43:23,990 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash 814015519, now seen corresponding path program 84 times [2021-02-19 17:43:23,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:23,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897289719] [2021-02-19 17:43:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:24,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897289719] [2021-02-19 17:43:24,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631573220] [2021-02-19 17:43:24,071 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) [2021-02-19 17:43:24,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:43:24,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:24,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,213 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 17 treesize of output 13 [2021-02-19 17:43:24,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,218 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 [2021-02-19 17:43:24,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,221 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 [2021-02-19 17:43:24,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,259 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:24,260 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:24,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:24,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:24,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:24,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:24,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799291796] [2021-02-19 17:43:24,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:24,339 INFO L87 Difference]: Start difference. First operand 195 states and 529 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) [2021-02-19 17:43:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:25,023 INFO L93 Difference]: Finished difference Result 284 states and 675 transitions. [2021-02-19 17:43:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:43:25,024 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 [2021-02-19 17:43:25,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:25,025 INFO L225 Difference]: With dead ends: 284 [2021-02-19 17:43:25,025 INFO L226 Difference]: Without dead ends: 275 [2021-02-19 17:43:25,025 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:43:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-02-19 17:43:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 201. [2021-02-19 17:43:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.725) internal successors, (545), 200 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 545 transitions. [2021-02-19 17:43:25,029 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 545 transitions. Word has length 15 [2021-02-19 17:43:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:25,029 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 545 transitions. [2021-02-19 17:43:25,029 INFO L481 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) [2021-02-19 17:43:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 545 transitions. [2021-02-19 17:43:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:25,030 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:25,030 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:25,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:25,242 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1762608071, now seen corresponding path program 85 times [2021-02-19 17:43:25,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:25,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024054615] [2021-02-19 17:43:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:25,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024054615] [2021-02-19 17:43:25,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720175057] [2021-02-19 17:43:25,317 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 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 [2021-02-19 17:43:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:25,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:25,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,436 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 [2021-02-19 17:43:25,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:25,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,441 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 15 treesize of output 11 [2021-02-19 17:43:25,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:25,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:25,444 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 [2021-02-19 17:43:25,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:25,482 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:25,482 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:25,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:25,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:25,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:25,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:25,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907044470] [2021-02-19 17:43:25,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:25,536 INFO L87 Difference]: Start difference. First operand 201 states and 545 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) [2021-02-19 17:43:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:25,975 INFO L93 Difference]: Finished difference Result 268 states and 647 transitions. [2021-02-19 17:43:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:25,975 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 [2021-02-19 17:43:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:25,976 INFO L225 Difference]: With dead ends: 268 [2021-02-19 17:43:25,976 INFO L226 Difference]: Without dead ends: 266 [2021-02-19 17:43:25,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-02-19 17:43:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 190. [2021-02-19 17:43:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.6613756613756614) internal successors, (503), 189 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 503 transitions. [2021-02-19 17:43:25,979 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 503 transitions. Word has length 15 [2021-02-19 17:43:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:25,979 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 503 transitions. [2021-02-19 17:43:25,979 INFO L481 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) [2021-02-19 17:43:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 503 transitions. [2021-02-19 17:43:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:25,980 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:25,980 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:26,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable576,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:26,201 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 821745917, now seen corresponding path program 86 times [2021-02-19 17:43:26,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:26,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315225271] [2021-02-19 17:43:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315225271] [2021-02-19 17:43:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356276166] [2021-02-19 17:43:26,280 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 [2021-02-19 17:43:26,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:26,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:26,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:26,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:26,430 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 [2021-02-19 17:43:26,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:26,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:26,433 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 [2021-02-19 17:43:26,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:26,459 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:26,459 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:26,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:26,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:26,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:26,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:26,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441423521] [2021-02-19 17:43:26,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:26,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:26,484 INFO L87 Difference]: Start difference. First operand 190 states and 503 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) [2021-02-19 17:43:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:26,961 INFO L93 Difference]: Finished difference Result 251 states and 618 transitions. [2021-02-19 17:43:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:43:26,961 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 [2021-02-19 17:43:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:26,962 INFO L225 Difference]: With dead ends: 251 [2021-02-19 17:43:26,962 INFO L226 Difference]: Without dead ends: 251 [2021-02-19 17:43:26,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:43:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-02-19 17:43:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 188. [2021-02-19 17:43:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6524064171122994) internal successors, (496), 187 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 496 transitions. [2021-02-19 17:43:26,966 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 496 transitions. Word has length 15 [2021-02-19 17:43:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:26,966 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 496 transitions. [2021-02-19 17:43:26,966 INFO L481 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) [2021-02-19 17:43:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 496 transitions. [2021-02-19 17:43:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:26,966 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:26,966 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:27,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:27,174 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:27,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:27,174 INFO L82 PathProgramCache]: Analyzing trace with hash -667659079, now seen corresponding path program 87 times [2021-02-19 17:43:27,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:27,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455538076] [2021-02-19 17:43:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455538076] [2021-02-19 17:43:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768326329] [2021-02-19 17:43:27,244 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 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 [2021-02-19 17:43:27,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:27,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,384 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 15 treesize of output 11 [2021-02-19 17:43:27,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,387 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 16 treesize of output 12 [2021-02-19 17:43:27,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,413 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:27,413 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:27,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:27,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:27,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:27,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430901503] [2021-02-19 17:43:27,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:27,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:27,438 INFO L87 Difference]: Start difference. First operand 188 states and 496 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) [2021-02-19 17:43:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:27,604 INFO L93 Difference]: Finished difference Result 219 states and 555 transitions. [2021-02-19 17:43:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:27,604 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 [2021-02-19 17:43:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:27,605 INFO L225 Difference]: With dead ends: 219 [2021-02-19 17:43:27,605 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:43:27,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:43:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 188. [2021-02-19 17:43:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6524064171122994) internal successors, (496), 187 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 496 transitions. [2021-02-19 17:43:27,608 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 496 transitions. Word has length 15 [2021-02-19 17:43:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:27,608 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 496 transitions. [2021-02-19 17:43:27,608 INFO L481 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) [2021-02-19 17:43:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 496 transitions. [2021-02-19 17:43:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:27,609 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:27,609 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:27,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-02-19 17:43:27,822 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1814621827, now seen corresponding path program 88 times [2021-02-19 17:43:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092822717] [2021-02-19 17:43:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:27,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092822717] [2021-02-19 17:43:27,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146772338] [2021-02-19 17:43:27,898 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 [2021-02-19 17:43:27,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:27,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:28,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,017 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 16 treesize of output 12 [2021-02-19 17:43:28,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,034 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-02-19 17:43:28,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:28,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-02-19 17:43:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:28,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:28,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:43:28,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761794805] [2021-02-19 17:43:28,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:43:28,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:43:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:43:28,057 INFO L87 Difference]: Start difference. First operand 188 states and 496 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) [2021-02-19 17:43:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:28,207 INFO L93 Difference]: Finished difference Result 254 states and 646 transitions. [2021-02-19 17:43:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:28,207 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 [2021-02-19 17:43:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:28,208 INFO L225 Difference]: With dead ends: 254 [2021-02-19 17:43:28,208 INFO L226 Difference]: Without dead ends: 254 [2021-02-19 17:43:28,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-02-19 17:43:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 188. [2021-02-19 17:43:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6524064171122994) internal successors, (496), 187 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 496 transitions. [2021-02-19 17:43:28,211 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 496 transitions. Word has length 15 [2021-02-19 17:43:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:28,211 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 496 transitions. [2021-02-19 17:43:28,211 INFO L481 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) [2021-02-19 17:43:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 496 transitions. [2021-02-19 17:43:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:28,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:28,212 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:28,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-02-19 17:43:28,418 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash 237280097, now seen corresponding path program 89 times [2021-02-19 17:43:28,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:28,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077249403] [2021-02-19 17:43:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077249403] [2021-02-19 17:43:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123419363] [2021-02-19 17:43:28,499 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 [2021-02-19 17:43:28,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:28,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:28,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:28,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:28,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,651 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 16 treesize of output 12 [2021-02-19 17:43:28,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,679 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:28,679 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:28,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:28,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:28,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:28,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517275035] [2021-02-19 17:43:28,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:28,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:28,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:28,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:28,702 INFO L87 Difference]: Start difference. First operand 188 states and 496 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) [2021-02-19 17:43:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:28,821 INFO L93 Difference]: Finished difference Result 254 states and 646 transitions. [2021-02-19 17:43:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:28,822 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 [2021-02-19 17:43:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:28,822 INFO L225 Difference]: With dead ends: 254 [2021-02-19 17:43:28,822 INFO L226 Difference]: Without dead ends: 254 [2021-02-19 17:43:28,822 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-02-19 17:43:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 188. [2021-02-19 17:43:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6524064171122994) internal successors, (496), 187 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 496 transitions. [2021-02-19 17:43:28,825 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 496 transitions. Word has length 15 [2021-02-19 17:43:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:28,825 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 496 transitions. [2021-02-19 17:43:28,825 INFO L481 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) [2021-02-19 17:43:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 496 transitions. [2021-02-19 17:43:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:28,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:28,825 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:29,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-02-19 17:43:29,026 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash 476922435, now seen corresponding path program 90 times [2021-02-19 17:43:29,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:29,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647774201] [2021-02-19 17:43:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:29,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647774201] [2021-02-19 17:43:29,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982351346] [2021-02-19 17:43:29,100 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 [2021-02-19 17:43:29,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:29,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:29,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:29,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:29,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:29,249 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 [2021-02-19 17:43:29,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:29,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:29,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:29,278 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:29,278 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:29,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:29,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:29,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:29,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321866629] [2021-02-19 17:43:29,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:29,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:29,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:29,301 INFO L87 Difference]: Start difference. First operand 188 states and 496 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) [2021-02-19 17:43:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:29,601 INFO L93 Difference]: Finished difference Result 269 states and 675 transitions. [2021-02-19 17:43:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:29,602 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 [2021-02-19 17:43:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:29,602 INFO L225 Difference]: With dead ends: 269 [2021-02-19 17:43:29,602 INFO L226 Difference]: Without dead ends: 269 [2021-02-19 17:43:29,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-02-19 17:43:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 190. [2021-02-19 17:43:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.6560846560846563) internal successors, (502), 189 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 502 transitions. [2021-02-19 17:43:29,605 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 502 transitions. Word has length 15 [2021-02-19 17:43:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:29,605 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 502 transitions. [2021-02-19 17:43:29,605 INFO L481 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) [2021-02-19 17:43:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 502 transitions. [2021-02-19 17:43:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:29,606 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:29,606 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:29,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:29,822 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 484652833, now seen corresponding path program 91 times [2021-02-19 17:43:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:29,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010247202] [2021-02-19 17:43:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:29,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010247202] [2021-02-19 17:43:29,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112537150] [2021-02-19 17:43:29,922 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) [2021-02-19 17:43:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:30,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,050 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 [2021-02-19 17:43:30,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,054 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 [2021-02-19 17:43:30,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,059 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 17 treesize of output 13 [2021-02-19 17:43:30,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,063 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 16 treesize of output 12 [2021-02-19 17:43:30,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,101 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:30,102 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:30,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:30,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:30,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:30,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:30,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25123726] [2021-02-19 17:43:30,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:30,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:30,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:30,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:30,156 INFO L87 Difference]: Start difference. First operand 190 states and 502 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) [2021-02-19 17:43:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:30,643 INFO L93 Difference]: Finished difference Result 325 states and 757 transitions. [2021-02-19 17:43:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:30,643 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 [2021-02-19 17:43:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:30,644 INFO L225 Difference]: With dead ends: 325 [2021-02-19 17:43:30,644 INFO L226 Difference]: Without dead ends: 325 [2021-02-19 17:43:30,644 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:43:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-02-19 17:43:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 196. [2021-02-19 17:43:30,647 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) [2021-02-19 17:43:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-02-19 17:43:30,647 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-02-19 17:43:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:30,647 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-02-19 17:43:30,647 INFO L481 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) [2021-02-19 17:43:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-02-19 17:43:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:30,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:30,648 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:30,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:30,848 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1286269061, now seen corresponding path program 92 times [2021-02-19 17:43:30,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:30,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985383690] [2021-02-19 17:43:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:30,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985383690] [2021-02-19 17:43:30,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401452513] [2021-02-19 17:43:30,942 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 [2021-02-19 17:43:30,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:30,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:30,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:31,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,065 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 [2021-02-19 17:43:31,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,069 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 16 treesize of output 12 [2021-02-19 17:43:31,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,073 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 [2021-02-19 17:43:31,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,077 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 [2021-02-19 17:43:31,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,117 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:31,117 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:31,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:31,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:31,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:31,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:31,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486138126] [2021-02-19 17:43:31,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:31,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:31,189 INFO L87 Difference]: Start difference. First operand 196 states and 524 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) [2021-02-19 17:43:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:31,699 INFO L93 Difference]: Finished difference Result 308 states and 732 transitions. [2021-02-19 17:43:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:43:31,700 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 [2021-02-19 17:43:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:31,700 INFO L225 Difference]: With dead ends: 308 [2021-02-19 17:43:31,700 INFO L226 Difference]: Without dead ends: 305 [2021-02-19 17:43:31,701 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-02-19 17:43:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 196. [2021-02-19 17:43:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6769230769230767) internal successors, (522), 195 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 522 transitions. [2021-02-19 17:43:31,703 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 522 transitions. Word has length 15 [2021-02-19 17:43:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:31,703 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 522 transitions. [2021-02-19 17:43:31,703 INFO L481 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) [2021-02-19 17:43:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 522 transitions. [2021-02-19 17:43:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:31,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:31,704 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:31,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-02-19 17:43:31,904 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1290354529, now seen corresponding path program 93 times [2021-02-19 17:43:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:31,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673264641] [2021-02-19 17:43:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:31,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673264641] [2021-02-19 17:43:31,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179493168] [2021-02-19 17:43:31,995 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 [2021-02-19 17:43:32,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:32,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:43:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:32,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,113 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 15 treesize of output 11 [2021-02-19 17:43:32,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,117 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 [2021-02-19 17:43:32,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:32,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,125 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 [2021-02-19 17:43:32,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,164 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:32,165 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:32,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:32,165 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:32,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:32,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:32,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410977845] [2021-02-19 17:43:32,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:32,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:32,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:32,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:32,221 INFO L87 Difference]: Start difference. First operand 196 states and 522 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) [2021-02-19 17:43:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:32,477 INFO L93 Difference]: Finished difference Result 305 states and 724 transitions. [2021-02-19 17:43:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:43:32,478 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 [2021-02-19 17:43:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:32,478 INFO L225 Difference]: With dead ends: 305 [2021-02-19 17:43:32,478 INFO L226 Difference]: Without dead ends: 305 [2021-02-19 17:43:32,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:43:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-02-19 17:43:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 195. [2021-02-19 17:43:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.670103092783505) internal successors, (518), 194 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 518 transitions. [2021-02-19 17:43:32,481 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 518 transitions. Word has length 15 [2021-02-19 17:43:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:32,481 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 518 transitions. [2021-02-19 17:43:32,481 INFO L481 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) [2021-02-19 17:43:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 518 transitions. [2021-02-19 17:43:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:32,482 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:32,482 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:32,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:32,682 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1950903079, now seen corresponding path program 94 times [2021-02-19 17:43:32,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:32,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677349243] [2021-02-19 17:43:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677349243] [2021-02-19 17:43:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136432698] [2021-02-19 17:43:32,769 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) [2021-02-19 17:43:32,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:32,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,937 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 15 treesize of output 11 [2021-02-19 17:43:32,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:32,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,973 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:32,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:32,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:32,974 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:33,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:33,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:33,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264445342] [2021-02-19 17:43:33,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:33,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:33,002 INFO L87 Difference]: Start difference. First operand 195 states and 518 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) [2021-02-19 17:43:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:33,236 INFO L93 Difference]: Finished difference Result 266 states and 652 transitions. [2021-02-19 17:43:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:43:33,237 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 [2021-02-19 17:43:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:33,238 INFO L225 Difference]: With dead ends: 266 [2021-02-19 17:43:33,238 INFO L226 Difference]: Without dead ends: 266 [2021-02-19 17:43:33,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-02-19 17:43:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 204. [2021-02-19 17:43:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.684729064039409) internal successors, (545), 203 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 545 transitions. [2021-02-19 17:43:33,241 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 545 transitions. Word has length 15 [2021-02-19 17:43:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:33,241 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 545 transitions. [2021-02-19 17:43:33,241 INFO L481 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) [2021-02-19 17:43:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 545 transitions. [2021-02-19 17:43:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:33,241 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:33,242 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:33,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:33,454 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash -396853955, now seen corresponding path program 95 times [2021-02-19 17:43:33,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:33,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457224551] [2021-02-19 17:43:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:33,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457224551] [2021-02-19 17:43:33,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038287737] [2021-02-19 17:43:33,538 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 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 [2021-02-19 17:43:33,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:33,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:33,699 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 8 treesize of output 6 [2021-02-19 17:43:33,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:33,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:33,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:33,704 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 16 treesize of output 12 [2021-02-19 17:43:33,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:33,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:33,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:33,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:33,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:33,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:33,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:33,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:33,719 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 [2021-02-19 17:43:33,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:33,757 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:33,757 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:33,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:33,758 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:33,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:33,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:33,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135936479] [2021-02-19 17:43:33,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:33,789 INFO L87 Difference]: Start difference. First operand 204 states and 545 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) [2021-02-19 17:43:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:34,077 INFO L93 Difference]: Finished difference Result 235 states and 598 transitions. [2021-02-19 17:43:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:34,078 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 [2021-02-19 17:43:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:34,078 INFO L225 Difference]: With dead ends: 235 [2021-02-19 17:43:34,078 INFO L226 Difference]: Without dead ends: 232 [2021-02-19 17:43:34,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-02-19 17:43:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 205. [2021-02-19 17:43:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6715686274509802) internal successors, (545), 204 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 545 transitions. [2021-02-19 17:43:34,081 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 545 transitions. Word has length 15 [2021-02-19 17:43:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:34,081 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 545 transitions. [2021-02-19 17:43:34,081 INFO L481 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) [2021-02-19 17:43:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 545 transitions. [2021-02-19 17:43:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:34,081 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:34,081 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:34,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-02-19 17:43:34,282 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1711260741, now seen corresponding path program 96 times [2021-02-19 17:43:34,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:34,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83381112] [2021-02-19 17:43:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83381112] [2021-02-19 17:43:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825094964] [2021-02-19 17:43:34,351 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 [2021-02-19 17:43:34,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:34,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:34,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:34,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:34,485 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 15 treesize of output 11 [2021-02-19 17:43:34,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:34,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:34,490 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 [2021-02-19 17:43:34,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:34,518 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:34,518 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:34,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:34,519 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:34,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:34,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:34,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844959378] [2021-02-19 17:43:34,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:34,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:34,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:34,541 INFO L87 Difference]: Start difference. First operand 205 states and 545 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) [2021-02-19 17:43:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:34,839 INFO L93 Difference]: Finished difference Result 238 states and 607 transitions. [2021-02-19 17:43:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:34,839 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 [2021-02-19 17:43:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:34,840 INFO L225 Difference]: With dead ends: 238 [2021-02-19 17:43:34,840 INFO L226 Difference]: Without dead ends: 238 [2021-02-19 17:43:34,840 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-02-19 17:43:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 200. [2021-02-19 17:43:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.6733668341708543) internal successors, (532), 199 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 532 transitions. [2021-02-19 17:43:34,845 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 532 transitions. Word has length 15 [2021-02-19 17:43:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:34,845 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 532 transitions. [2021-02-19 17:43:34,845 INFO L481 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) [2021-02-19 17:43:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 532 transitions. [2021-02-19 17:43:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:34,845 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:34,845 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:35,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:35,046 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1664005847, now seen corresponding path program 97 times [2021-02-19 17:43:35,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:35,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344342021] [2021-02-19 17:43:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:35,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344342021] [2021-02-19 17:43:35,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020576449] [2021-02-19 17:43:35,131 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 [2021-02-19 17:43:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:35,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:35,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,295 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 [2021-02-19 17:43:35,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:35,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,303 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 8 treesize of output 6 [2021-02-19 17:43:35,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,308 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 17 treesize of output 13 [2021-02-19 17:43:35,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:35,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,349 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:35,349 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:35,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:35,351 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:35,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:35,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:35,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816583375] [2021-02-19 17:43:35,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:35,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:35,381 INFO L87 Difference]: Start difference. First operand 200 states and 532 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) [2021-02-19 17:43:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:35,592 INFO L93 Difference]: Finished difference Result 227 states and 581 transitions. [2021-02-19 17:43:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:35,592 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 [2021-02-19 17:43:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:35,593 INFO L225 Difference]: With dead ends: 227 [2021-02-19 17:43:35,593 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:43:35,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:43:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:43:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 200. [2021-02-19 17:43:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.6683417085427137) internal successors, (531), 199 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 531 transitions. [2021-02-19 17:43:35,595 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 531 transitions. Word has length 15 [2021-02-19 17:43:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:35,595 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 531 transitions. [2021-02-19 17:43:35,595 INFO L481 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) [2021-02-19 17:43:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 531 transitions. [2021-02-19 17:43:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:35,596 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:35,596 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:35,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-02-19 17:43:35,798 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1703530343, now seen corresponding path program 98 times [2021-02-19 17:43:35,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:35,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770960836] [2021-02-19 17:43:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:35,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770960836] [2021-02-19 17:43:35,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503586787] [2021-02-19 17:43:35,892 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 [2021-02-19 17:43:35,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:35,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:35,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,994 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 15 treesize of output 11 [2021-02-19 17:43:35,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:35,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:35,998 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 [2021-02-19 17:43:35,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,003 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 [2021-02-19 17:43:36,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:36,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,064 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:36,064 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:36,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:36,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:36,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:36,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:36,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395895688] [2021-02-19 17:43:36,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:36,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:36,118 INFO L87 Difference]: Start difference. First operand 200 states and 531 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) [2021-02-19 17:43:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:36,525 INFO L93 Difference]: Finished difference Result 295 states and 691 transitions. [2021-02-19 17:43:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:36,525 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 [2021-02-19 17:43:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:36,526 INFO L225 Difference]: With dead ends: 295 [2021-02-19 17:43:36,526 INFO L226 Difference]: Without dead ends: 295 [2021-02-19 17:43:36,526 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:43:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-02-19 17:43:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 206. [2021-02-19 17:43:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.6975609756097563) internal successors, (553), 205 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 553 transitions. [2021-02-19 17:43:36,528 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 553 transitions. Word has length 15 [2021-02-19 17:43:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:36,528 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 553 transitions. [2021-02-19 17:43:36,528 INFO L481 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) [2021-02-19 17:43:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 553 transitions. [2021-02-19 17:43:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:36,529 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:36,529 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:36,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:36,729 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash -901914115, now seen corresponding path program 99 times [2021-02-19 17:43:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:36,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112186872] [2021-02-19 17:43:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:36,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112186872] [2021-02-19 17:43:36,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485426953] [2021-02-19 17:43:36,819 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 [2021-02-19 17:43:36,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:36,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:36,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,938 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 [2021-02-19 17:43:36,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:36,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,947 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 17 treesize of output 13 [2021-02-19 17:43:36,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,951 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 16 treesize of output 12 [2021-02-19 17:43:36,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,991 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:36,991 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:36,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:36,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:37,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:37,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:37,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048242627] [2021-02-19 17:43:37,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:37,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:37,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:37,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:37,062 INFO L87 Difference]: Start difference. First operand 206 states and 553 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) [2021-02-19 17:43:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:37,376 INFO L93 Difference]: Finished difference Result 267 states and 649 transitions. [2021-02-19 17:43:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:37,377 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 [2021-02-19 17:43:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:37,377 INFO L225 Difference]: With dead ends: 267 [2021-02-19 17:43:37,377 INFO L226 Difference]: Without dead ends: 264 [2021-02-19 17:43:37,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-19 17:43:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 206. [2021-02-19 17:43:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.6878048780487807) internal successors, (551), 205 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 551 transitions. [2021-02-19 17:43:37,380 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 551 transitions. Word has length 15 [2021-02-19 17:43:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:37,380 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 551 transitions. [2021-02-19 17:43:37,380 INFO L481 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) [2021-02-19 17:43:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 551 transitions. [2021-02-19 17:43:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:37,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:37,380 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:37,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-02-19 17:43:37,586 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash 816429591, now seen corresponding path program 100 times [2021-02-19 17:43:37,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:37,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329974539] [2021-02-19 17:43:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:37,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329974539] [2021-02-19 17:43:37,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835898465] [2021-02-19 17:43:37,705 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 [2021-02-19 17:43:37,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:37,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:37,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:37,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:37,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,838 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 15 treesize of output 11 [2021-02-19 17:43:37,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:37,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,849 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 17 treesize of output 13 [2021-02-19 17:43:37,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,854 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 [2021-02-19 17:43:37,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,895 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:37,896 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:37,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:37,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:37,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:37,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:37,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561071749] [2021-02-19 17:43:37,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:37,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:37,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:37,955 INFO L87 Difference]: Start difference. First operand 206 states and 551 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) [2021-02-19 17:43:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:38,148 INFO L93 Difference]: Finished difference Result 267 states and 650 transitions. [2021-02-19 17:43:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:43:38,149 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 [2021-02-19 17:43:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:38,149 INFO L225 Difference]: With dead ends: 267 [2021-02-19 17:43:38,149 INFO L226 Difference]: Without dead ends: 267 [2021-02-19 17:43:38,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-19 17:43:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 200. [2021-02-19 17:43:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.6683417085427137) internal successors, (531), 199 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 531 transitions. [2021-02-19 17:43:38,152 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 531 transitions. Word has length 15 [2021-02-19 17:43:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:38,152 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 531 transitions. [2021-02-19 17:43:38,152 INFO L481 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) [2021-02-19 17:43:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 531 transitions. [2021-02-19 17:43:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:38,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:38,153 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:38,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-02-19 17:43:38,362 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:38,362 INFO L82 PathProgramCache]: Analyzing trace with hash -638175361, now seen corresponding path program 101 times [2021-02-19 17:43:38,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:38,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114803330] [2021-02-19 17:43:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:38,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114803330] [2021-02-19 17:43:38,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310135106] [2021-02-19 17:43:38,432 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 [2021-02-19 17:43:38,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:38,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,559 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 16 treesize of output 12 [2021-02-19 17:43:38,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,563 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 [2021-02-19 17:43:38,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,589 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:38,589 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:38,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:38,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:38,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564292897] [2021-02-19 17:43:38,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:38,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:38,619 INFO L87 Difference]: Start difference. First operand 200 states and 531 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) [2021-02-19 17:43:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:38,830 INFO L93 Difference]: Finished difference Result 271 states and 662 transitions. [2021-02-19 17:43:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:38,831 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 [2021-02-19 17:43:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:38,831 INFO L225 Difference]: With dead ends: 271 [2021-02-19 17:43:38,831 INFO L226 Difference]: Without dead ends: 271 [2021-02-19 17:43:38,831 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-02-19 17:43:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 203. [2021-02-19 17:43:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.6831683168316833) internal successors, (542), 202 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 542 transitions. [2021-02-19 17:43:38,834 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 542 transitions. Word has length 15 [2021-02-19 17:43:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:38,834 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 542 transitions. [2021-02-19 17:43:38,834 INFO L481 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) [2021-02-19 17:43:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 542 transitions. [2021-02-19 17:43:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:38,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:38,834 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:39,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-02-19 17:43:39,035 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:39,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1557876069, now seen corresponding path program 102 times [2021-02-19 17:43:39,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:39,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499566442] [2021-02-19 17:43:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:39,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499566442] [2021-02-19 17:43:39,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282247817] [2021-02-19 17:43:39,124 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 [2021-02-19 17:43:39,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:43:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:39,264 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 [2021-02-19 17:43:39,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,269 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 [2021-02-19 17:43:39,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,273 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 [2021-02-19 17:43:39,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:39,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,281 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 17 treesize of output 13 [2021-02-19 17:43:39,282 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,285 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 7 treesize of output 5 [2021-02-19 17:43:39,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,322 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:39,323 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:39,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:39,324 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:39,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:39,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:39,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669904038] [2021-02-19 17:43:39,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:39,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:39,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:39,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:39,354 INFO L87 Difference]: Start difference. First operand 203 states and 542 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) [2021-02-19 17:43:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:39,712 INFO L93 Difference]: Finished difference Result 247 states and 614 transitions. [2021-02-19 17:43:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:43:39,713 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 [2021-02-19 17:43:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:39,713 INFO L225 Difference]: With dead ends: 247 [2021-02-19 17:43:39,713 INFO L226 Difference]: Without dead ends: 243 [2021-02-19 17:43:39,713 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:43:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-02-19 17:43:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 203. [2021-02-19 17:43:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.6732673267326734) internal successors, (540), 202 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 540 transitions. [2021-02-19 17:43:39,716 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 540 transitions. Word has length 15 [2021-02-19 17:43:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:39,716 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 540 transitions. [2021-02-19 17:43:39,716 INFO L481 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) [2021-02-19 17:43:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 540 transitions. [2021-02-19 17:43:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:39,717 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:39,717 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:39,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:39,926 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash 977076223, now seen corresponding path program 103 times [2021-02-19 17:43:39,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:39,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391074209] [2021-02-19 17:43:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391074209] [2021-02-19 17:43:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864556420] [2021-02-19 17:43:40,028 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 [2021-02-19 17:43:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:40,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,129 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 [2021-02-19 17:43:40,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:40,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,133 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 [2021-02-19 17:43:40,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:40,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:40,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:40,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:40,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:40,182 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:40,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:40,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:40,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:40,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:40,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781554577] [2021-02-19 17:43:40,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:40,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:40,260 INFO L87 Difference]: Start difference. First operand 203 states and 540 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) [2021-02-19 17:43:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:40,781 INFO L93 Difference]: Finished difference Result 259 states and 628 transitions. [2021-02-19 17:43:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:43:40,781 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 [2021-02-19 17:43:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:40,782 INFO L225 Difference]: With dead ends: 259 [2021-02-19 17:43:40,782 INFO L226 Difference]: Without dead ends: 255 [2021-02-19 17:43:40,782 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-02-19 17:43:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 203. [2021-02-19 17:43:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.6584158415841586) internal successors, (537), 202 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 537 transitions. [2021-02-19 17:43:40,785 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 537 transitions. Word has length 15 [2021-02-19 17:43:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:40,785 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 537 transitions. [2021-02-19 17:43:40,785 INFO L481 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) [2021-02-19 17:43:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 537 transitions. [2021-02-19 17:43:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:40,786 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:40,786 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:40,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-02-19 17:43:40,986 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:40,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2119849959, now seen corresponding path program 104 times [2021-02-19 17:43:40,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:40,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769736567] [2021-02-19 17:43:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:41,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769736567] [2021-02-19 17:43:41,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665352572] [2021-02-19 17:43:41,078 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 [2021-02-19 17:43:41,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:41,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,175 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 15 treesize of output 11 [2021-02-19 17:43:41,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,179 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 [2021-02-19 17:43:41,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,184 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 17 treesize of output 13 [2021-02-19 17:43:41,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:41,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,227 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:41,227 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:41,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:41,228 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:41,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:41,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:41,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116081547] [2021-02-19 17:43:41,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:41,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:41,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:41,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:41,282 INFO L87 Difference]: Start difference. First operand 203 states and 537 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) [2021-02-19 17:43:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:41,626 INFO L93 Difference]: Finished difference Result 317 states and 742 transitions. [2021-02-19 17:43:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:41,626 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 [2021-02-19 17:43:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:41,627 INFO L225 Difference]: With dead ends: 317 [2021-02-19 17:43:41,627 INFO L226 Difference]: Without dead ends: 317 [2021-02-19 17:43:41,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:43:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-19 17:43:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 214. [2021-02-19 17:43:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.7136150234741785) internal successors, (578), 213 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 578 transitions. [2021-02-19 17:43:41,629 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 578 transitions. Word has length 15 [2021-02-19 17:43:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:41,629 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 578 transitions. [2021-02-19 17:43:41,630 INFO L481 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) [2021-02-19 17:43:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 578 transitions. [2021-02-19 17:43:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:41,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:41,630 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:41,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:41,830 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:41,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1318233731, now seen corresponding path program 105 times [2021-02-19 17:43:41,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:41,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129154512] [2021-02-19 17:43:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:41,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129154512] [2021-02-19 17:43:41,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726281978] [2021-02-19 17:43:41,908 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 [2021-02-19 17:43:41,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:41,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:42,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,007 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 [2021-02-19 17:43:42,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,013 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 16 treesize of output 12 [2021-02-19 17:43:42,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,019 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 [2021-02-19 17:43:42,021 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:42,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,071 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:42,071 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:42,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:42,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:42,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:42,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:42,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598398865] [2021-02-19 17:43:42,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:42,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:42,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:42,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:42,145 INFO L87 Difference]: Start difference. First operand 214 states and 578 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) [2021-02-19 17:43:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:42,687 INFO L93 Difference]: Finished difference Result 303 states and 723 transitions. [2021-02-19 17:43:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:43:42,687 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 [2021-02-19 17:43:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:42,688 INFO L225 Difference]: With dead ends: 303 [2021-02-19 17:43:42,688 INFO L226 Difference]: Without dead ends: 297 [2021-02-19 17:43:42,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:43:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-02-19 17:43:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 216. [2021-02-19 17:43:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.7069767441860466) internal successors, (582), 215 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 582 transitions. [2021-02-19 17:43:42,691 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 582 transitions. Word has length 15 [2021-02-19 17:43:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:42,691 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 582 transitions. [2021-02-19 17:43:42,691 INFO L481 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) [2021-02-19 17:43:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 582 transitions. [2021-02-19 17:43:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:42,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:42,691 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:42,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-02-19 17:43:42,892 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:42,892 INFO L82 PathProgramCache]: Analyzing trace with hash 400109975, now seen corresponding path program 106 times [2021-02-19 17:43:42,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:42,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558277247] [2021-02-19 17:43:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:42,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558277247] [2021-02-19 17:43:42,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223302949] [2021-02-19 17:43:42,965 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 [2021-02-19 17:43:42,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:42,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:42,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:43,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,060 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 15 treesize of output 11 [2021-02-19 17:43:43,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,066 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 16 treesize of output 12 [2021-02-19 17:43:43,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,071 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 17 treesize of output 13 [2021-02-19 17:43:43,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:43,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,115 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:43,115 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:43,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:43,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884897803] [2021-02-19 17:43:43,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:43,172 INFO L87 Difference]: Start difference. First operand 216 states and 582 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) [2021-02-19 17:43:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:43,505 INFO L93 Difference]: Finished difference Result 296 states and 712 transitions. [2021-02-19 17:43:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:43,505 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 [2021-02-19 17:43:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:43,506 INFO L225 Difference]: With dead ends: 296 [2021-02-19 17:43:43,506 INFO L226 Difference]: Without dead ends: 296 [2021-02-19 17:43:43,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-02-19 17:43:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 214. [2021-02-19 17:43:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.6901408450704225) internal successors, (573), 213 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 573 transitions. [2021-02-19 17:43:43,509 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 573 transitions. Word has length 15 [2021-02-19 17:43:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:43,509 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 573 transitions. [2021-02-19 17:43:43,509 INFO L481 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) [2021-02-19 17:43:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 573 transitions. [2021-02-19 17:43:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:43,510 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:43,510 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:43,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:43,710 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:43,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1310503333, now seen corresponding path program 107 times [2021-02-19 17:43:43,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:43,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356355644] [2021-02-19 17:43:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:43,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356355644] [2021-02-19 17:43:43,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678994599] [2021-02-19 17:43:43,791 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 [2021-02-19 17:43:43,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,908 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 [2021-02-19 17:43:43,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:43,912 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 [2021-02-19 17:43:43,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,933 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:43:43,934 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:43,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:43,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:43:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:43,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:43,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:43:43,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914676856] [2021-02-19 17:43:43,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:43,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:43,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:43,961 INFO L87 Difference]: Start difference. First operand 214 states and 573 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) [2021-02-19 17:43:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:44,165 INFO L93 Difference]: Finished difference Result 294 states and 710 transitions. [2021-02-19 17:43:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:44,166 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 [2021-02-19 17:43:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:44,166 INFO L225 Difference]: With dead ends: 294 [2021-02-19 17:43:44,167 INFO L226 Difference]: Without dead ends: 294 [2021-02-19 17:43:44,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:43:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-02-19 17:43:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 214. [2021-02-19 17:43:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.6901408450704225) internal successors, (573), 213 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 573 transitions. [2021-02-19 17:43:44,170 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 573 transitions. Word has length 15 [2021-02-19 17:43:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:44,170 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 573 transitions. [2021-02-19 17:43:44,170 INFO L481 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) [2021-02-19 17:43:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 573 transitions. [2021-02-19 17:43:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:44,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:44,171 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:44,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable671 [2021-02-19 17:43:44,393 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1065104799, now seen corresponding path program 108 times [2021-02-19 17:43:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:44,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959889762] [2021-02-19 17:43:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:44,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959889762] [2021-02-19 17:43:44,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912254071] [2021-02-19 17:43:44,471 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) [2021-02-19 17:43:44,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:44,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:44,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,659 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 [2021-02-19 17:43:44,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,664 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 [2021-02-19 17:43:44,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,696 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:44,696 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:44,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:44,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:44,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846263771] [2021-02-19 17:43:44,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:44,727 INFO L87 Difference]: Start difference. First operand 214 states and 573 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) [2021-02-19 17:43:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:44,986 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2021-02-19 17:43:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:44,986 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 [2021-02-19 17:43:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:44,987 INFO L225 Difference]: With dead ends: 291 [2021-02-19 17:43:44,987 INFO L226 Difference]: Without dead ends: 291 [2021-02-19 17:43:44,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-02-19 17:43:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2021-02-19 17:43:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.708520179372197) internal successors, (604), 223 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) [2021-02-19 17:43:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 604 transitions. [2021-02-19 17:43:44,991 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 604 transitions. Word has length 15 [2021-02-19 17:43:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:44,991 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 604 transitions. [2021-02-19 17:43:44,991 INFO L481 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) [2021-02-19 17:43:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 604 transitions. [2021-02-19 17:43:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:44,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:44,991 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:45,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-02-19 17:43:45,192 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash 488944325, now seen corresponding path program 109 times [2021-02-19 17:43:45,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:45,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996256138] [2021-02-19 17:43:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996256138] [2021-02-19 17:43:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823475929] [2021-02-19 17:43:45,265 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 [2021-02-19 17:43:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:45,470 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 [2021-02-19 17:43:45,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:45,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:45,477 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 16 treesize of output 12 [2021-02-19 17:43:45,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,482 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 [2021-02-19 17:43:45,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,488 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 8 treesize of output 6 [2021-02-19 17:43:45,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:45,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:45,494 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 17 treesize of output 13 [2021-02-19 17:43:45,495 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,498 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 7 treesize of output 5 [2021-02-19 17:43:45,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,536 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:45,536 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:45,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:45,537 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:45,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:45,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:45,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736928484] [2021-02-19 17:43:45,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:45,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:45,570 INFO L87 Difference]: Start difference. First operand 224 states and 604 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) [2021-02-19 17:43:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:46,059 INFO L93 Difference]: Finished difference Result 276 states and 684 transitions. [2021-02-19 17:43:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:43:46,060 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 [2021-02-19 17:43:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:46,060 INFO L225 Difference]: With dead ends: 276 [2021-02-19 17:43:46,060 INFO L226 Difference]: Without dead ends: 273 [2021-02-19 17:43:46,060 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-02-19 17:43:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 230. [2021-02-19 17:43:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.7117903930131004) internal successors, (621), 229 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) [2021-02-19 17:43:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 621 transitions. [2021-02-19 17:43:46,063 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 621 transitions. Word has length 15 [2021-02-19 17:43:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:46,063 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 621 transitions. [2021-02-19 17:43:46,063 INFO L481 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) [2021-02-19 17:43:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 621 transitions. [2021-02-19 17:43:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:46,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:46,063 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:46,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-02-19 17:43:46,264 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:46,264 INFO L82 PathProgramCache]: Analyzing trace with hash -825462461, now seen corresponding path program 110 times [2021-02-19 17:43:46,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:46,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999858781] [2021-02-19 17:43:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999858781] [2021-02-19 17:43:46,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217535669] [2021-02-19 17:43:46,342 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 [2021-02-19 17:43:46,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:46,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:46,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:46,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,491 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 16 treesize of output 12 [2021-02-19 17:43:46,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,495 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 [2021-02-19 17:43:46,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,521 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:46,521 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:46,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:46,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:46,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:46,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803266015] [2021-02-19 17:43:46,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:46,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:46,545 INFO L87 Difference]: Start difference. First operand 230 states and 621 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) [2021-02-19 17:43:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:47,014 INFO L93 Difference]: Finished difference Result 301 states and 734 transitions. [2021-02-19 17:43:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:43:47,015 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 [2021-02-19 17:43:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:47,015 INFO L225 Difference]: With dead ends: 301 [2021-02-19 17:43:47,015 INFO L226 Difference]: Without dead ends: 301 [2021-02-19 17:43:47,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:43:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-02-19 17:43:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 226. [2021-02-19 17:43:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.7244444444444444) internal successors, (613), 225 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 613 transitions. [2021-02-19 17:43:47,018 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 613 transitions. Word has length 15 [2021-02-19 17:43:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:47,018 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 613 transitions. [2021-02-19 17:43:47,018 INFO L481 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) [2021-02-19 17:43:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 613 transitions. [2021-02-19 17:43:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:47,019 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:47,019 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:47,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:47,219 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1745163169, now seen corresponding path program 111 times [2021-02-19 17:43:47,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:47,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003753513] [2021-02-19 17:43:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:47,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003753513] [2021-02-19 17:43:47,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660328466] [2021-02-19 17:43:47,302 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 [2021-02-19 17:43:47,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:43:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:47,473 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 [2021-02-19 17:43:47,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,479 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 [2021-02-19 17:43:47,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:47,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,488 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 8 treesize of output 6 [2021-02-19 17:43:47,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,494 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 17 treesize of output 13 [2021-02-19 17:43:47,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:47,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,544 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:47,545 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:47,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:47,546 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:47,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:47,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:47,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87635803] [2021-02-19 17:43:47,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:47,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:47,588 INFO L87 Difference]: Start difference. First operand 226 states and 613 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) [2021-02-19 17:43:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:48,044 INFO L93 Difference]: Finished difference Result 269 states and 673 transitions. [2021-02-19 17:43:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:48,044 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 [2021-02-19 17:43:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:48,045 INFO L225 Difference]: With dead ends: 269 [2021-02-19 17:43:48,045 INFO L226 Difference]: Without dead ends: 267 [2021-02-19 17:43:48,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:43:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-19 17:43:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 226. [2021-02-19 17:43:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.72) internal successors, (612), 225 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 612 transitions. [2021-02-19 17:43:48,048 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 612 transitions. Word has length 15 [2021-02-19 17:43:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:48,048 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 612 transitions. [2021-02-19 17:43:48,048 INFO L481 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) [2021-02-19 17:43:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 612 transitions. [2021-02-19 17:43:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:48,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:48,048 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:48,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-02-19 17:43:48,249 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash -817732063, now seen corresponding path program 112 times [2021-02-19 17:43:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340748075] [2021-02-19 17:43:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340748075] [2021-02-19 17:43:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059625643] [2021-02-19 17:43:48,342 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 [2021-02-19 17:43:48,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:48,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:48,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:48,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,465 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 15 treesize of output 11 [2021-02-19 17:43:48,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,470 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 [2021-02-19 17:43:48,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,474 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 17 treesize of output 13 [2021-02-19 17:43:48,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,479 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 [2021-02-19 17:43:48,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,519 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:48,520 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:48,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:48,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:48,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:48,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609025747] [2021-02-19 17:43:48,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:48,576 INFO L87 Difference]: Start difference. First operand 226 states and 612 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) [2021-02-19 17:43:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:49,035 INFO L93 Difference]: Finished difference Result 304 states and 717 transitions. [2021-02-19 17:43:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:49,035 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 [2021-02-19 17:43:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:49,036 INFO L225 Difference]: With dead ends: 304 [2021-02-19 17:43:49,036 INFO L226 Difference]: Without dead ends: 304 [2021-02-19 17:43:49,036 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-02-19 17:43:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 220. [2021-02-19 17:43:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.6986301369863015) internal successors, (591), 219 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) [2021-02-19 17:43:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 591 transitions. [2021-02-19 17:43:49,038 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 591 transitions. Word has length 15 [2021-02-19 17:43:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:49,038 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 591 transitions. [2021-02-19 17:43:49,039 INFO L481 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) [2021-02-19 17:43:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 591 transitions. [2021-02-19 17:43:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:49,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:49,039 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:49,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:49,239 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash -16115835, now seen corresponding path program 113 times [2021-02-19 17:43:49,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:49,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286708704] [2021-02-19 17:43:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286708704] [2021-02-19 17:43:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422446990] [2021-02-19 17:43:49,339 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 [2021-02-19 17:43:49,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:49,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,464 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 15 treesize of output 11 [2021-02-19 17:43:49,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,481 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 16 treesize of output 12 [2021-02-19 17:43:49,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,486 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 [2021-02-19 17:43:49,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,492 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 [2021-02-19 17:43:49,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,533 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:49,534 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:49,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:49,534 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:49,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:49,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:49,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084028821] [2021-02-19 17:43:49,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:49,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:49,607 INFO L87 Difference]: Start difference. First operand 220 states and 591 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) [2021-02-19 17:43:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:50,023 INFO L93 Difference]: Finished difference Result 278 states and 682 transitions. [2021-02-19 17:43:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:50,034 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 [2021-02-19 17:43:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:50,035 INFO L225 Difference]: With dead ends: 278 [2021-02-19 17:43:50,035 INFO L226 Difference]: Without dead ends: 274 [2021-02-19 17:43:50,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-02-19 17:43:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 221. [2021-02-19 17:43:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.690909090909091) internal successors, (592), 220 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 592 transitions. [2021-02-19 17:43:50,039 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 592 transitions. Word has length 15 [2021-02-19 17:43:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:50,039 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 592 transitions. [2021-02-19 17:43:50,039 INFO L481 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) [2021-02-19 17:43:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 592 transitions. [2021-02-19 17:43:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:50,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:50,039 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:50,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-02-19 17:43:50,262 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1702227871, now seen corresponding path program 114 times [2021-02-19 17:43:50,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:50,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676518269] [2021-02-19 17:43:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:50,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676518269] [2021-02-19 17:43:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325722461] [2021-02-19 17:43:50,371 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 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 [2021-02-19 17:43:50,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:50,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,519 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 [2021-02-19 17:43:50,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:50,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,533 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 17 treesize of output 13 [2021-02-19 17:43:50,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:50,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:50,587 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:50,588 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:50,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:50,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:50,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:50,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241330945] [2021-02-19 17:43:50,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:50,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:50,668 INFO L87 Difference]: Start difference. First operand 221 states and 592 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) [2021-02-19 17:43:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:50,933 INFO L93 Difference]: Finished difference Result 275 states and 675 transitions. [2021-02-19 17:43:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:43:50,934 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 [2021-02-19 17:43:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:50,934 INFO L225 Difference]: With dead ends: 275 [2021-02-19 17:43:50,934 INFO L226 Difference]: Without dead ends: 275 [2021-02-19 17:43:50,934 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:43:50,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-02-19 17:43:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 212. [2021-02-19 17:43:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.677725118483412) internal successors, (565), 211 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 565 transitions. [2021-02-19 17:43:50,937 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 565 transitions. Word has length 15 [2021-02-19 17:43:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:50,938 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 565 transitions. [2021-02-19 17:43:50,938 INFO L481 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) [2021-02-19 17:43:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 565 transitions. [2021-02-19 17:43:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:50,938 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:50,938 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:51,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-02-19 17:43:51,154 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -846468669, now seen corresponding path program 115 times [2021-02-19 17:43:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:51,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379159376] [2021-02-19 17:43:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:51,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379159376] [2021-02-19 17:43:51,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100214936] [2021-02-19 17:43:51,219 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) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:51,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:51,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,361 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 [2021-02-19 17:43:51,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,372 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 16 treesize of output 12 [2021-02-19 17:43:51,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:51,400 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:43:51,401 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:51,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:43:51,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:43:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:51,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:51,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:51,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111854373] [2021-02-19 17:43:51,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:51,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:51,428 INFO L87 Difference]: Start difference. First operand 212 states and 565 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) [2021-02-19 17:43:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:51,609 INFO L93 Difference]: Finished difference Result 311 states and 774 transitions. [2021-02-19 17:43:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:43:51,610 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 [2021-02-19 17:43:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:51,610 INFO L225 Difference]: With dead ends: 311 [2021-02-19 17:43:51,610 INFO L226 Difference]: Without dead ends: 311 [2021-02-19 17:43:51,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-02-19 17:43:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 234. [2021-02-19 17:43:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.755364806866953) internal successors, (642), 233 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 642 transitions. [2021-02-19 17:43:51,613 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 642 transitions. Word has length 15 [2021-02-19 17:43:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:51,613 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 642 transitions. [2021-02-19 17:43:51,614 INFO L481 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) [2021-02-19 17:43:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 642 transitions. [2021-02-19 17:43:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:51,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:51,614 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:51,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:51,814 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:51,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1766169377, now seen corresponding path program 116 times [2021-02-19 17:43:51,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:51,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104578841] [2021-02-19 17:43:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:51,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104578841] [2021-02-19 17:43:51,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535204230] [2021-02-19 17:43:51,901 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 [2021-02-19 17:43:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:51,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:51,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:52,090 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 8 treesize of output 6 [2021-02-19 17:43:52,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:52,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,100 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 7 treesize of output 5 [2021-02-19 17:43:52,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:52,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,110 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 17 treesize of output 13 [2021-02-19 17:43:52,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:52,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,159 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:43:52,159 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:52,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:52,161 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:43:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:52,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:52,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:52,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545824119] [2021-02-19 17:43:52,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:52,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:52,202 INFO L87 Difference]: Start difference. First operand 234 states and 642 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) [2021-02-19 17:43:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:52,647 INFO L93 Difference]: Finished difference Result 282 states and 713 transitions. [2021-02-19 17:43:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:43:52,648 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 [2021-02-19 17:43:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:52,648 INFO L225 Difference]: With dead ends: 282 [2021-02-19 17:43:52,648 INFO L226 Difference]: Without dead ends: 278 [2021-02-19 17:43:52,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:43:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-02-19 17:43:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 234. [2021-02-19 17:43:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7510729613733904) internal successors, (641), 233 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) [2021-02-19 17:43:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 641 transitions. [2021-02-19 17:43:52,652 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 641 transitions. Word has length 15 [2021-02-19 17:43:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:52,652 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 641 transitions. [2021-02-19 17:43:52,652 INFO L481 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) [2021-02-19 17:43:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 641 transitions. [2021-02-19 17:43:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:52,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:52,653 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:52,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:52,862 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash -838738271, now seen corresponding path program 117 times [2021-02-19 17:43:52,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:52,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505485124] [2021-02-19 17:43:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:52,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505485124] [2021-02-19 17:43:52,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372641439] [2021-02-19 17:43:52,937 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 [2021-02-19 17:43:52,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:43:52,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,054 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 15 treesize of output 11 [2021-02-19 17:43:53,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,059 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 [2021-02-19 17:43:53,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,063 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 [2021-02-19 17:43:53,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,067 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 [2021-02-19 17:43:53,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,107 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:53,108 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:53,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:53,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:53,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:53,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:53,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791891591] [2021-02-19 17:43:53,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:53,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:53,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:53,163 INFO L87 Difference]: Start difference. First operand 234 states and 641 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) [2021-02-19 17:43:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:53,456 INFO L93 Difference]: Finished difference Result 335 states and 797 transitions. [2021-02-19 17:43:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:43:53,456 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 [2021-02-19 17:43:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:53,457 INFO L225 Difference]: With dead ends: 335 [2021-02-19 17:43:53,457 INFO L226 Difference]: Without dead ends: 335 [2021-02-19 17:43:53,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-02-19 17:43:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 235. [2021-02-19 17:43:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.752136752136752) internal successors, (644), 234 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 644 transitions. [2021-02-19 17:43:53,460 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 644 transitions. Word has length 15 [2021-02-19 17:43:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:53,460 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 644 transitions. [2021-02-19 17:43:53,460 INFO L481 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) [2021-02-19 17:43:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 644 transitions. [2021-02-19 17:43:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:53,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:53,460 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:53,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:53,661 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash -37122043, now seen corresponding path program 118 times [2021-02-19 17:43:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:53,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982082151] [2021-02-19 17:43:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:53,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982082151] [2021-02-19 17:43:53,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40619909] [2021-02-19 17:43:53,746 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 [2021-02-19 17:43:53,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:53,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,862 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 15 treesize of output 11 [2021-02-19 17:43:53,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:53,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:53,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:53,874 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 [2021-02-19 17:43:53,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:53,915 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:53,915 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:53,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:53,916 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:53,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:53,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:53,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032257773] [2021-02-19 17:43:53,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:53,990 INFO L87 Difference]: Start difference. First operand 235 states and 644 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) [2021-02-19 17:43:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:54,458 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-02-19 17:43:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:43:54,459 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 [2021-02-19 17:43:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:54,459 INFO L225 Difference]: With dead ends: 333 [2021-02-19 17:43:54,459 INFO L226 Difference]: Without dead ends: 329 [2021-02-19 17:43:54,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-02-19 17:43:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 227. [2021-02-19 17:43:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.7035398230088497) internal successors, (611), 226 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) [2021-02-19 17:43:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2021-02-19 17:43:54,462 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 15 [2021-02-19 17:43:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:54,463 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2021-02-19 17:43:54,463 INFO L481 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) [2021-02-19 17:43:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2021-02-19 17:43:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:54,463 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:54,463 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:54,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:54,666 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1681221663, now seen corresponding path program 119 times [2021-02-19 17:43:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:54,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876012848] [2021-02-19 17:43:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876012848] [2021-02-19 17:43:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016590335] [2021-02-19 17:43:54,751 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 [2021-02-19 17:43:54,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:43:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:54,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,881 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 15 treesize of output 11 [2021-02-19 17:43:54,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:54,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,894 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 17 treesize of output 13 [2021-02-19 17:43:54,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,900 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 [2021-02-19 17:43:54,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,956 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:54,957 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:54,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:54,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:55,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:55,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:55,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926499186] [2021-02-19 17:43:55,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:55,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:55,029 INFO L87 Difference]: Start difference. First operand 227 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) [2021-02-19 17:43:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:55,347 INFO L93 Difference]: Finished difference Result 288 states and 725 transitions. [2021-02-19 17:43:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:55,347 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 [2021-02-19 17:43:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:55,348 INFO L225 Difference]: With dead ends: 288 [2021-02-19 17:43:55,348 INFO L226 Difference]: Without dead ends: 288 [2021-02-19 17:43:55,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:43:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-02-19 17:43:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 232. [2021-02-19 17:43:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.727272727272727) internal successors, (630), 231 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 630 transitions. [2021-02-19 17:43:55,351 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 630 transitions. Word has length 15 [2021-02-19 17:43:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:55,351 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 630 transitions. [2021-02-19 17:43:55,351 INFO L481 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) [2021-02-19 17:43:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 630 transitions. [2021-02-19 17:43:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:55,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:55,351 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:55,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-02-19 17:43:55,552 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash -720622081, now seen corresponding path program 120 times [2021-02-19 17:43:55,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:55,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772057287] [2021-02-19 17:43:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:43:55,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772057287] [2021-02-19 17:43:55,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194059343] [2021-02-19 17:43:55,617 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 [2021-02-19 17:43:55,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:55,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:55,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:55,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,721 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 [2021-02-19 17:43:55,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:55,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,729 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 17 treesize of output 13 [2021-02-19 17:43:55,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:55,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,774 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:55,775 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:55,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:55,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:55,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:55,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:55,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896522880] [2021-02-19 17:43:55,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:55,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:55,856 INFO L87 Difference]: Start difference. First operand 232 states and 630 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) [2021-02-19 17:43:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:56,347 INFO L93 Difference]: Finished difference Result 290 states and 717 transitions. [2021-02-19 17:43:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:56,347 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 [2021-02-19 17:43:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:56,348 INFO L225 Difference]: With dead ends: 290 [2021-02-19 17:43:56,348 INFO L226 Difference]: Without dead ends: 286 [2021-02-19 17:43:56,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:43:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-02-19 17:43:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 233. [2021-02-19 17:43:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7241379310344827) internal successors, (632), 232 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 632 transitions. [2021-02-19 17:43:56,350 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 632 transitions. Word has length 15 [2021-02-19 17:43:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:56,350 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 632 transitions. [2021-02-19 17:43:56,351 INFO L481 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) [2021-02-19 17:43:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 632 transitions. [2021-02-19 17:43:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:56,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:56,351 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:56,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable731,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:56,551 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1008425253, now seen corresponding path program 121 times [2021-02-19 17:43:56,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:56,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980663738] [2021-02-19 17:43:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:43:56,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980663738] [2021-02-19 17:43:56,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598309086] [2021-02-19 17:43:56,624 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 [2021-02-19 17:43:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:56,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:56,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:56,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:56,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:56,754 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 [2021-02-19 17:43:56,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:56,758 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 8 treesize of output 6 [2021-02-19 17:43:56,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:56,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:56,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:56,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:43:56,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:43:56,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:56,807 INFO L628 ElimStorePlain]: treesize reduction 32, result has 47.5 percent of original size [2021-02-19 17:43:56,808 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:56,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:43:56,808 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:43:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:56,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:56,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 17:43:56,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520024327] [2021-02-19 17:43:56,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:43:56,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:43:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:43:56,845 INFO L87 Difference]: Start difference. First operand 233 states and 632 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) [2021-02-19 17:43:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:57,223 INFO L93 Difference]: Finished difference Result 257 states and 667 transitions. [2021-02-19 17:43:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:43:57,223 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 [2021-02-19 17:43:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:57,224 INFO L225 Difference]: With dead ends: 257 [2021-02-19 17:43:57,224 INFO L226 Difference]: Without dead ends: 249 [2021-02-19 17:43:57,224 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-19 17:43:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 233. [2021-02-19 17:43:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7155172413793105) internal successors, (630), 232 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 630 transitions. [2021-02-19 17:43:57,226 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 630 transitions. Word has length 15 [2021-02-19 17:43:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:57,226 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 630 transitions. [2021-02-19 17:43:57,226 INFO L481 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) [2021-02-19 17:43:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 630 transitions. [2021-02-19 17:43:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:57,227 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:57,227 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:57,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-02-19 17:43:57,427 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:57,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1255057887, now seen corresponding path program 122 times [2021-02-19 17:43:57,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:57,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071162808] [2021-02-19 17:43:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:57,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071162808] [2021-02-19 17:43:57,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252030218] [2021-02-19 17:43:57,516 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 [2021-02-19 17:43:57,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:57,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,646 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 [2021-02-19 17:43:57,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,650 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 [2021-02-19 17:43:57,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:57,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,658 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 [2021-02-19 17:43:57,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,701 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:57,701 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:57,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:57,701 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:57,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:57,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:57,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640808999] [2021-02-19 17:43:57,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:57,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:57,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:57,761 INFO L87 Difference]: Start difference. First operand 233 states and 630 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) [2021-02-19 17:43:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:58,100 INFO L93 Difference]: Finished difference Result 334 states and 808 transitions. [2021-02-19 17:43:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:58,101 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 [2021-02-19 17:43:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:58,102 INFO L225 Difference]: With dead ends: 334 [2021-02-19 17:43:58,102 INFO L226 Difference]: Without dead ends: 334 [2021-02-19 17:43:58,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-02-19 17:43:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 244. [2021-02-19 17:43:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.753086419753086) internal successors, (669), 243 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 669 transitions. [2021-02-19 17:43:58,106 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 669 transitions. Word has length 15 [2021-02-19 17:43:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:58,106 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 669 transitions. [2021-02-19 17:43:58,106 INFO L481 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) [2021-02-19 17:43:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 669 transitions. [2021-02-19 17:43:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:58,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:58,106 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:58,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-02-19 17:43:58,307 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash -453441659, now seen corresponding path program 123 times [2021-02-19 17:43:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:58,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476232030] [2021-02-19 17:43:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:58,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476232030] [2021-02-19 17:43:58,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715490047] [2021-02-19 17:43:58,408 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 [2021-02-19 17:43:58,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:43:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:58,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:58,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:58,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,578 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 [2021-02-19 17:43:58,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,584 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 17 treesize of output 13 [2021-02-19 17:43:58,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:43:58,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,648 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:58,649 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:58,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:58,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:43:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:58,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:58,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:58,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561360538] [2021-02-19 17:43:58,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:58,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:58,747 INFO L87 Difference]: Start difference. First operand 244 states and 669 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) [2021-02-19 17:43:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:59,491 INFO L93 Difference]: Finished difference Result 337 states and 821 transitions. [2021-02-19 17:43:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:43:59,491 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 [2021-02-19 17:43:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:59,492 INFO L225 Difference]: With dead ends: 337 [2021-02-19 17:43:59,492 INFO L226 Difference]: Without dead ends: 328 [2021-02-19 17:43:59,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:43:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-02-19 17:43:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 250. [2021-02-19 17:43:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.751004016064257) internal successors, (685), 249 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 685 transitions. [2021-02-19 17:43:59,495 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 685 transitions. Word has length 15 [2021-02-19 17:43:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:59,495 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 685 transitions. [2021-02-19 17:43:59,495 INFO L481 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) [2021-02-19 17:43:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 685 transitions. [2021-02-19 17:43:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:43:59,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:59,495 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:59,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-02-19 17:43:59,696 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1264902047, now seen corresponding path program 124 times [2021-02-19 17:43:59,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:59,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442837496] [2021-02-19 17:43:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:59,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442837496] [2021-02-19 17:43:59,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218124467] [2021-02-19 17:43:59,774 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 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 [2021-02-19 17:43:59,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:59,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:43:59,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:59,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,901 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 15 treesize of output 11 [2021-02-19 17:43:59,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:59,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,905 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 16 treesize of output 12 [2021-02-19 17:43:59,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:59,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,909 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 [2021-02-19 17:43:59,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:59,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:59,913 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 [2021-02-19 17:43:59,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:59,956 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:43:59,956 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:59,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:43:59,957 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:44:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:00,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:00,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:44:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879415512] [2021-02-19 17:44:00,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:00,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:00,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:00,017 INFO L87 Difference]: Start difference. First operand 250 states and 685 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) [2021-02-19 17:44:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:00,474 INFO L93 Difference]: Finished difference Result 323 states and 800 transitions. [2021-02-19 17:44:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:44:00,475 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 [2021-02-19 17:44:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:00,475 INFO L225 Difference]: With dead ends: 323 [2021-02-19 17:44:00,475 INFO L226 Difference]: Without dead ends: 321 [2021-02-19 17:44:00,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:44:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-02-19 17:44:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 239. [2021-02-19 17:44:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.7016806722689077) internal successors, (643), 238 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 643 transitions. [2021-02-19 17:44:00,478 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 643 transitions. Word has length 15 [2021-02-19 17:44:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:00,478 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 643 transitions. [2021-02-19 17:44:00,478 INFO L481 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) [2021-02-19 17:44:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 643 transitions. [2021-02-19 17:44:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:44:00,479 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:00,479 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:00,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-02-19 17:44:00,679 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash -445711261, now seen corresponding path program 125 times [2021-02-19 17:44:00,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:00,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959772598] [2021-02-19 17:44:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:00,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959772598] [2021-02-19 17:44:00,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400256987] [2021-02-19 17:44:00,757 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 [2021-02-19 17:44:00,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:44:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:44:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:00,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,910 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 [2021-02-19 17:44:00,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,914 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 [2021-02-19 17:44:00,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:00,936 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:44:00,937 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:00,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:00,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:44:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:00,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:00,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:44:00,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601957284] [2021-02-19 17:44:00,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:00,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:00,966 INFO L87 Difference]: Start difference. First operand 239 states and 643 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) [2021-02-19 17:44:01,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:01,546 INFO L93 Difference]: Finished difference Result 302 states and 762 transitions. [2021-02-19 17:44:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:44:01,546 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 [2021-02-19 17:44:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:01,547 INFO L225 Difference]: With dead ends: 302 [2021-02-19 17:44:01,547 INFO L226 Difference]: Without dead ends: 302 [2021-02-19 17:44:01,547 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:44:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-02-19 17:44:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 236. [2021-02-19 17:44:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6936170212765957) internal successors, (633), 235 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 633 transitions. [2021-02-19 17:44:01,550 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 633 transitions. Word has length 15 [2021-02-19 17:44:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:01,550 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 633 transitions. [2021-02-19 17:44:01,550 INFO L481 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) [2021-02-19 17:44:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 633 transitions. [2021-02-19 17:44:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:44:01,550 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:01,550 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:01,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-02-19 17:44:01,758 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1935116257, now seen corresponding path program 126 times [2021-02-19 17:44:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:01,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740910820] [2021-02-19 17:44:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:01,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740910820] [2021-02-19 17:44:01,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323335098] [2021-02-19 17:44:01,831 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 [2021-02-19 17:44:01,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:44:01,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:44:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:01,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:01,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:01,963 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 [2021-02-19 17:44:01,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:01,967 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 16 treesize of output 12 [2021-02-19 17:44:01,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,990 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:44:01,990 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:01,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:44:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:02,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:02,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:44:02,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562873595] [2021-02-19 17:44:02,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:02,023 INFO L87 Difference]: Start difference. First operand 236 states and 633 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) [2021-02-19 17:44:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:02,226 INFO L93 Difference]: Finished difference Result 266 states and 690 transitions. [2021-02-19 17:44:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:02,227 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 [2021-02-19 17:44:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:02,227 INFO L225 Difference]: With dead ends: 266 [2021-02-19 17:44:02,227 INFO L226 Difference]: Without dead ends: 266 [2021-02-19 17:44:02,227 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-02-19 17:44:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 230. [2021-02-19 17:44:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.6986899563318776) internal successors, (618), 229 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 618 transitions. [2021-02-19 17:44:02,230 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 618 transitions. Word has length 15 [2021-02-19 17:44:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:02,230 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 618 transitions. [2021-02-19 17:44:02,230 INFO L481 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) [2021-02-19 17:44:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 618 transitions. [2021-02-19 17:44:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:02,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:02,231 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:02,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable756,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:02,446 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash 757370329, now seen corresponding path program 127 times [2021-02-19 17:44:02,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:02,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458969495] [2021-02-19 17:44:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458969495] [2021-02-19 17:44:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452287866] [2021-02-19 17:44:02,838 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) [2021-02-19 17:44:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:02,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:03,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:03,493 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 [2021-02-19 17:44:03,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:03,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:03,506 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 49 treesize of output 35 [2021-02-19 17:44:03,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:03,529 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-02-19 17:44:03,529 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:03,529 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-02-19 17:44:03,530 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-02-19 17:44:03,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:03,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:44:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:03,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:03,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:44:03,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050202727] [2021-02-19 17:44:03,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:44:03,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:44:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:44:03,563 INFO L87 Difference]: Start difference. First operand 230 states and 618 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) [2021-02-19 17:44:04,005 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 17:44:04,436 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-02-19 17:44:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:04,601 INFO L93 Difference]: Finished difference Result 357 states and 927 transitions. [2021-02-19 17:44:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:44:04,602 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 [2021-02-19 17:44:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:04,603 INFO L225 Difference]: With dead ends: 357 [2021-02-19 17:44:04,603 INFO L226 Difference]: Without dead ends: 354 [2021-02-19 17:44:04,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:44:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-02-19 17:44:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 241. [2021-02-19 17:44:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.683333333333333) internal successors, (644), 240 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 644 transitions. [2021-02-19 17:44:04,607 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 644 transitions. Word has length 16 [2021-02-19 17:44:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:04,607 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 644 transitions. [2021-02-19 17:44:04,607 INFO L481 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) [2021-02-19 17:44:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 644 transitions. [2021-02-19 17:44:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:04,608 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:04,608 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:04,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:04,829 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:04,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1098862549, now seen corresponding path program 128 times [2021-02-19 17:44:04,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:04,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554244578] [2021-02-19 17:44:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:05,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554244578] [2021-02-19 17:44:05,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523181787] [2021-02-19 17:44:05,060 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 [2021-02-19 17:44:05,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:05,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:05,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:05,463 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:44:05,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,641 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 [2021-02-19 17:44:05,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,656 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 [2021-02-19 17:44:05,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,665 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 [2021-02-19 17:44:05,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,683 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-02-19 17:44:05,683 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:05,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,684 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-02-19 17:44:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:05,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:05,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-02-19 17:44:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268865002] [2021-02-19 17:44:05,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:05,696 INFO L87 Difference]: Start difference. First operand 241 states and 644 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) [2021-02-19 17:44:06,407 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-19 17:44:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:06,790 INFO L93 Difference]: Finished difference Result 348 states and 870 transitions. [2021-02-19 17:44:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:44:06,790 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 [2021-02-19 17:44:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:06,791 INFO L225 Difference]: With dead ends: 348 [2021-02-19 17:44:06,791 INFO L226 Difference]: Without dead ends: 342 [2021-02-19 17:44:06,791 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:44:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-02-19 17:44:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 257. [2021-02-19 17:44:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.73828125) internal successors, (701), 256 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 701 transitions. [2021-02-19 17:44:06,794 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 701 transitions. Word has length 16 [2021-02-19 17:44:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:06,794 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 701 transitions. [2021-02-19 17:44:06,794 INFO L481 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) [2021-02-19 17:44:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 701 transitions. [2021-02-19 17:44:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:06,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:06,795 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:06,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-02-19 17:44:06,995 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1091132151, now seen corresponding path program 129 times [2021-02-19 17:44:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956661110] [2021-02-19 17:44:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:07,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956661110] [2021-02-19 17:44:07,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510805304] [2021-02-19 17:44:07,418 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 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 [2021-02-19 17:44:07,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:44:07,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:07,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:07,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:07,850 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-02-19 17:44:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,039 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 [2021-02-19 17:44:08,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,050 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 [2021-02-19 17:44:08,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,108 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-02-19 17:44:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:08,115 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 [2021-02-19 17:44:08,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,130 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:08,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,133 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 10 treesize of output 6 [2021-02-19 17:44:08,135 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:44:08,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:08,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:44:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:08,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:08,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:44:08,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730684236] [2021-02-19 17:44:08,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:44:08,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:44:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:44:08,195 INFO L87 Difference]: Start difference. First operand 257 states and 701 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) [2021-02-19 17:44:08,523 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 17:44:08,658 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-02-19 17:44:08,837 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-02-19 17:44:09,147 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 17:44:09,394 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-02-19 17:44:09,621 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-02-19 17:44:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:09,971 INFO L93 Difference]: Finished difference Result 364 states and 919 transitions. [2021-02-19 17:44:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:44:09,971 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 [2021-02-19 17:44:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:09,972 INFO L225 Difference]: With dead ends: 364 [2021-02-19 17:44:09,972 INFO L226 Difference]: Without dead ends: 358 [2021-02-19 17:44:09,972 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:44:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-02-19 17:44:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2021-02-19 17:44:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.772727272727273) internal successors, (732), 264 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 732 transitions. [2021-02-19 17:44:09,975 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 732 transitions. Word has length 16 [2021-02-19 17:44:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:09,975 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 732 transitions. [2021-02-19 17:44:09,975 INFO L481 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) [2021-02-19 17:44:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 732 transitions. [2021-02-19 17:44:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:09,975 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:09,975 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:10,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable803 [2021-02-19 17:44:10,176 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1714430149, now seen corresponding path program 130 times [2021-02-19 17:44:10,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:10,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569830042] [2021-02-19 17:44:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:10,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569830042] [2021-02-19 17:44:10,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414710416] [2021-02-19 17:44:10,779 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 [2021-02-19 17:44:10,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:10,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:10,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,309 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 [2021-02-19 17:44:11,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,318 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 [2021-02-19 17:44:11,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,373 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-02-19 17:44:11,374 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:11,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,380 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 [2021-02-19 17:44:11,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:11,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,399 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 10 treesize of output 6 [2021-02-19 17:44:11,401 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:44:11,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:11,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:11,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:44:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:11,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:11,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:11,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759407022] [2021-02-19 17:44:11,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:11,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:11,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:11,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:11,462 INFO L87 Difference]: Start difference. First operand 265 states and 732 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) [2021-02-19 17:44:11,807 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-02-19 17:44:12,064 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 17:44:12,393 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-02-19 17:44:12,554 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 17:44:12,750 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-02-19 17:44:13,016 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-02-19 17:44:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:13,538 INFO L93 Difference]: Finished difference Result 323 states and 856 transitions. [2021-02-19 17:44:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:44:13,538 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 [2021-02-19 17:44:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:13,539 INFO L225 Difference]: With dead ends: 323 [2021-02-19 17:44:13,539 INFO L226 Difference]: Without dead ends: 319 [2021-02-19 17:44:13,539 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:44:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-02-19 17:44:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 271. [2021-02-19 17:44:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.774074074074074) internal successors, (749), 270 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 749 transitions. [2021-02-19 17:44:13,542 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 749 transitions. Word has length 16 [2021-02-19 17:44:13,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:13,542 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 749 transitions. [2021-02-19 17:44:13,542 INFO L481 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) [2021-02-19 17:44:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 749 transitions. [2021-02-19 17:44:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:13,542 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:13,542 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:13,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:13,743 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1507451767, now seen corresponding path program 131 times [2021-02-19 17:44:13,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:13,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36191059] [2021-02-19 17:44:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36191059] [2021-02-19 17:44:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840007221] [2021-02-19 17:44:14,005 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 [2021-02-19 17:44:14,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:44:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:14,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,533 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 [2021-02-19 17:44:14,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:14,557 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-02-19 17:44:14,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_76 vanished before elimination [2021-02-19 17:44:14,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-02-19 17:44:14,558 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:14,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:14,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:44:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:14,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:14,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:44:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551525421] [2021-02-19 17:44:14,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:14,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:14,594 INFO L87 Difference]: Start difference. First operand 271 states and 749 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) [2021-02-19 17:44:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:15,705 INFO L93 Difference]: Finished difference Result 326 states and 864 transitions. [2021-02-19 17:44:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:44:15,706 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 [2021-02-19 17:44:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:15,707 INFO L225 Difference]: With dead ends: 326 [2021-02-19 17:44:15,707 INFO L226 Difference]: Without dead ends: 323 [2021-02-19 17:44:15,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:44:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-02-19 17:44:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 271. [2021-02-19 17:44:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.774074074074074) internal successors, (749), 270 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 749 transitions. [2021-02-19 17:44:15,710 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 749 transitions. Word has length 16 [2021-02-19 17:44:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:15,710 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 749 transitions. [2021-02-19 17:44:15,710 INFO L481 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) [2021-02-19 17:44:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 749 transitions. [2021-02-19 17:44:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:15,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:15,710 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:15,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:15,911 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 608535399, now seen corresponding path program 132 times [2021-02-19 17:44:15,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:15,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906793787] [2021-02-19 17:44:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:16,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906793787] [2021-02-19 17:44:16,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823179361] [2021-02-19 17:44:16,292 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 [2021-02-19 17:44:16,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:44:16,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:16,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:16,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:16,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:16,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,863 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 [2021-02-19 17:44:16,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,873 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 [2021-02-19 17:44:16,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:16,879 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 [2021-02-19 17:44:16,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,898 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:44:16,898 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:16,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,899 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-02-19 17:44:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:16,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:16,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-02-19 17:44:16,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362222822] [2021-02-19 17:44:16,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:16,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:16,911 INFO L87 Difference]: Start difference. First operand 271 states and 749 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) [2021-02-19 17:44:17,267 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 17:44:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:18,151 INFO L93 Difference]: Finished difference Result 363 states and 926 transitions. [2021-02-19 17:44:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:44:18,152 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 [2021-02-19 17:44:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:18,153 INFO L225 Difference]: With dead ends: 363 [2021-02-19 17:44:18,153 INFO L226 Difference]: Without dead ends: 356 [2021-02-19 17:44:18,153 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:44:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-02-19 17:44:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 293. [2021-02-19 17:44:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-02-19 17:44:18,156 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 16 [2021-02-19 17:44:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:18,156 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-02-19 17:44:18,156 INFO L481 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) [2021-02-19 17:44:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-02-19 17:44:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:18,156 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:18,156 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:18,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:18,362 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash 855908135, now seen corresponding path program 133 times [2021-02-19 17:44:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:18,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812476016] [2021-02-19 17:44:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812476016] [2021-02-19 17:44:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111824531] [2021-02-19 17:44:18,699 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 [2021-02-19 17:44:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:18,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:19,006 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:44:19,253 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:44:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:19,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:19,448 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 [2021-02-19 17:44:19,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:19,459 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 [2021-02-19 17:44:19,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:19,516 INFO L628 ElimStorePlain]: treesize reduction 76, result has 46.9 percent of original size [2021-02-19 17:44:19,516 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:19,521 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 [2021-02-19 17:44:19,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:19,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:19,539 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 10 treesize of output 6 [2021-02-19 17:44:19,541 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:44:19,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:19,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:19,555 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:197, output treesize:22 [2021-02-19 17:44:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:19,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:19,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:44:19,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716204918] [2021-02-19 17:44:19,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:19,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:19,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:19,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:19,601 INFO L87 Difference]: Start difference. First operand 293 states and 815 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) [2021-02-19 17:44:19,808 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 17:44:20,038 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-02-19 17:44:20,199 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-02-19 17:44:20,869 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 17:44:21,150 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 17:44:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:21,282 INFO L93 Difference]: Finished difference Result 343 states and 893 transitions. [2021-02-19 17:44:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:44:21,283 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 [2021-02-19 17:44:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:21,284 INFO L225 Difference]: With dead ends: 343 [2021-02-19 17:44:21,284 INFO L226 Difference]: Without dead ends: 339 [2021-02-19 17:44:21,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:44:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-02-19 17:44:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 290. [2021-02-19 17:44:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.782006920415225) internal successors, (804), 289 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 804 transitions. [2021-02-19 17:44:21,287 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 804 transitions. Word has length 16 [2021-02-19 17:44:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:21,287 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 804 transitions. [2021-02-19 17:44:21,287 INFO L481 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) [2021-02-19 17:44:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 804 transitions. [2021-02-19 17:44:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:21,287 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:21,287 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:21,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable874 [2021-02-19 17:44:21,488 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 439588519, now seen corresponding path program 134 times [2021-02-19 17:44:21,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:21,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288255874] [2021-02-19 17:44:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:21,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288255874] [2021-02-19 17:44:21,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171765406] [2021-02-19 17:44:21,764 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 [2021-02-19 17:44:21,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:21,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:21,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:21,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:22,014 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:44:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,418 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 [2021-02-19 17:44:22,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:22,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,429 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 47 treesize of output 33 [2021-02-19 17:44:22,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,447 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-02-19 17:44:22,448 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:44:22,448 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:22,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-02-19 17:44:22,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:44:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:22,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:22,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:44:22,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661446612] [2021-02-19 17:44:22,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:22,484 INFO L87 Difference]: Start difference. First operand 290 states and 804 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) [2021-02-19 17:44:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:23,298 INFO L93 Difference]: Finished difference Result 398 states and 1030 transitions. [2021-02-19 17:44:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:44:23,299 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 [2021-02-19 17:44:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:23,300 INFO L225 Difference]: With dead ends: 398 [2021-02-19 17:44:23,300 INFO L226 Difference]: Without dead ends: 394 [2021-02-19 17:44:23,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:44:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-02-19 17:44:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-02-19 17:44:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.7800687285223367) internal successors, (809), 291 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 809 transitions. [2021-02-19 17:44:23,305 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 809 transitions. Word has length 16 [2021-02-19 17:44:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:23,305 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 809 transitions. [2021-02-19 17:44:23,305 INFO L481 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) [2021-02-19 17:44:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 809 transitions. [2021-02-19 17:44:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:23,306 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:23,306 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:23,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-02-19 17:44:23,522 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash 827171529, now seen corresponding path program 135 times [2021-02-19 17:44:23,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:23,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441840341] [2021-02-19 17:44:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:23,959 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-02-19 17:44:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441840341] [2021-02-19 17:44:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854456259] [2021-02-19 17:44:24,027 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 [2021-02-19 17:44:24,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:44:24,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:24,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 17:44:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:24,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,532 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 [2021-02-19 17:44:24,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,546 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 [2021-02-19 17:44:24,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,560 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 [2021-02-19 17:44:24,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:24,570 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 [2021-02-19 17:44:24,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,651 INFO L628 ElimStorePlain]: treesize reduction 97, result has 42.9 percent of original size [2021-02-19 17:44:24,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,655 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 21 treesize of output 13 [2021-02-19 17:44:24,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:24,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:24,688 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:273, output treesize:62 [2021-02-19 17:44:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:24,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:24,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:44:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335658459] [2021-02-19 17:44:24,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:24,795 INFO L87 Difference]: Start difference. First operand 292 states and 809 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) [2021-02-19 17:44:25,346 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-02-19 17:44:25,587 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-02-19 17:44:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:26,142 INFO L93 Difference]: Finished difference Result 412 states and 1042 transitions. [2021-02-19 17:44:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:44:26,143 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 [2021-02-19 17:44:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:26,143 INFO L225 Difference]: With dead ends: 412 [2021-02-19 17:44:26,143 INFO L226 Difference]: Without dead ends: 406 [2021-02-19 17:44:26,143 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:44:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-02-19 17:44:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 317. [2021-02-19 17:44:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.8164556962025316) internal successors, (890), 316 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 890 transitions. [2021-02-19 17:44:26,147 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 890 transitions. Word has length 16 [2021-02-19 17:44:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:26,147 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 890 transitions. [2021-02-19 17:44:26,147 INFO L481 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) [2021-02-19 17:44:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 890 transitions. [2021-02-19 17:44:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:26,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:26,147 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:26,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:26,348 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash 418582311, now seen corresponding path program 136 times [2021-02-19 17:44:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:26,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973074105] [2021-02-19 17:44:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:26,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973074105] [2021-02-19 17:44:26,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549487806] [2021-02-19 17:44:26,744 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 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 [2021-02-19 17:44:26,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:26,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:26,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:27,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:27,327 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 47 treesize of output 33 [2021-02-19 17:44:27,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:27,339 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 37 treesize of output 25 [2021-02-19 17:44:27,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:27,400 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-02-19 17:44:27,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:27,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:27,411 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 [2021-02-19 17:44:27,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:27,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:27,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:27,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:44:27,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:27,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:27,447 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:27,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:27,448 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:44:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:27,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:27,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:27,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990603939] [2021-02-19 17:44:27,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:27,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:27,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:27,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:27,499 INFO L87 Difference]: Start difference. First operand 317 states and 890 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) [2021-02-19 17:44:27,718 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 17:44:27,882 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 17:44:28,016 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-02-19 17:44:28,314 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 17:44:28,662 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 17:44:28,875 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 17:44:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:29,102 INFO L93 Difference]: Finished difference Result 359 states and 972 transitions. [2021-02-19 17:44:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:44:29,102 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 [2021-02-19 17:44:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:29,103 INFO L225 Difference]: With dead ends: 359 [2021-02-19 17:44:29,103 INFO L226 Difference]: Without dead ends: 356 [2021-02-19 17:44:29,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:44:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-02-19 17:44:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 317. [2021-02-19 17:44:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.8164556962025316) internal successors, (890), 316 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 890 transitions. [2021-02-19 17:44:29,106 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 890 transitions. Word has length 16 [2021-02-19 17:44:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:29,106 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 890 transitions. [2021-02-19 17:44:29,106 INFO L481 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) [2021-02-19 17:44:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 890 transitions. [2021-02-19 17:44:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:29,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:29,107 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:29,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable920,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:29,307 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1998264235, now seen corresponding path program 137 times [2021-02-19 17:44:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:29,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452162886] [2021-02-19 17:44:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:29,768 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-02-19 17:44:29,929 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 17:44:30,083 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 17:44:30,213 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-02-19 17:44:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452162886] [2021-02-19 17:44:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932427833] [2021-02-19 17:44:30,308 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 [2021-02-19 17:44:30,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:44:30,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:30,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:30,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:30,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:30,818 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 [2021-02-19 17:44:30,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:30,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:30,831 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 [2021-02-19 17:44:30,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:30,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:30,840 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 [2021-02-19 17:44:30,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:30,863 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:44:30,864 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:30,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:30,865 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-02-19 17:44:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:30,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:30,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:30,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058099181] [2021-02-19 17:44:30,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:30,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:30,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:30,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:30,915 INFO L87 Difference]: Start difference. First operand 317 states and 890 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) [2021-02-19 17:44:31,395 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-19 17:44:31,632 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-02-19 17:44:31,793 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-02-19 17:44:32,172 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 17:44:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:32,246 INFO L93 Difference]: Finished difference Result 346 states and 939 transitions. [2021-02-19 17:44:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:44:32,247 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 [2021-02-19 17:44:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:32,247 INFO L225 Difference]: With dead ends: 346 [2021-02-19 17:44:32,247 INFO L226 Difference]: Without dead ends: 340 [2021-02-19 17:44:32,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:44:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-02-19 17:44:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2021-02-19 17:44:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8130841121495327) internal successors, (903), 321 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 903 transitions. [2021-02-19 17:44:32,251 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 903 transitions. Word has length 16 [2021-02-19 17:44:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:32,252 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 903 transitions. [2021-02-19 17:44:32,252 INFO L481 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) [2021-02-19 17:44:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 903 transitions. [2021-02-19 17:44:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:32,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:32,252 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:32,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-02-19 17:44:32,466 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:32,466 INFO L82 PathProgramCache]: Analyzing trace with hash 837242121, now seen corresponding path program 138 times [2021-02-19 17:44:32,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:32,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194838881] [2021-02-19 17:44:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:32,912 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-02-19 17:44:33,041 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 17:44:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:33,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194838881] [2021-02-19 17:44:33,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477697293] [2021-02-19 17:44:33,191 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 [2021-02-19 17:44:33,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:44:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:33,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:33,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:33,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:33,706 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 [2021-02-19 17:44:33,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:33,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:33,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:33,717 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 [2021-02-19 17:44:33,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:33,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:33,724 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 [2021-02-19 17:44:33,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:33,745 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-02-19 17:44:33,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:33,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:33,745 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-02-19 17:44:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:33,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:33,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520876215] [2021-02-19 17:44:33,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:33,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:33,785 INFO L87 Difference]: Start difference. First operand 322 states and 903 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) [2021-02-19 17:44:34,603 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2021-02-19 17:44:34,841 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-02-19 17:44:35,109 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2021-02-19 17:44:35,378 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2021-02-19 17:44:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:35,401 INFO L93 Difference]: Finished difference Result 349 states and 946 transitions. [2021-02-19 17:44:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:44:35,401 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 [2021-02-19 17:44:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:35,402 INFO L225 Difference]: With dead ends: 349 [2021-02-19 17:44:35,402 INFO L226 Difference]: Without dead ends: 339 [2021-02-19 17:44:35,402 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:44:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-02-19 17:44:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 326. [2021-02-19 17:44:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.809230769230769) internal successors, (913), 325 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 913 transitions. [2021-02-19 17:44:35,405 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 913 transitions. Word has length 16 [2021-02-19 17:44:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:35,405 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 913 transitions. [2021-02-19 17:44:35,405 INFO L481 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) [2021-02-19 17:44:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 913 transitions. [2021-02-19 17:44:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:35,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:35,406 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:35,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable968 [2021-02-19 17:44:35,606 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:35,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1076884459, now seen corresponding path program 139 times [2021-02-19 17:44:35,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:35,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922498521] [2021-02-19 17:44:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:35,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922498521] [2021-02-19 17:44:35,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035662882] [2021-02-19 17:44:35,937 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 [2021-02-19 17:44:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:35,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:35,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:36,347 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:44:36,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:36,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,510 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 [2021-02-19 17:44:36,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,521 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 [2021-02-19 17:44:36,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:36,528 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 [2021-02-19 17:44:36,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,547 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:44:36,547 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:36,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,548 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-02-19 17:44:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:36,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:36,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:44:36,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818544920] [2021-02-19 17:44:36,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:44:36,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:44:36,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:44:36,578 INFO L87 Difference]: Start difference. First operand 326 states and 913 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) [2021-02-19 17:44:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:37,284 INFO L93 Difference]: Finished difference Result 393 states and 1025 transitions. [2021-02-19 17:44:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:44:37,285 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 [2021-02-19 17:44:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:37,285 INFO L225 Difference]: With dead ends: 393 [2021-02-19 17:44:37,285 INFO L226 Difference]: Without dead ends: 382 [2021-02-19 17:44:37,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:44:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-02-19 17:44:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 338. [2021-02-19 17:44:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.801186943620178) internal successors, (944), 337 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 944 transitions. [2021-02-19 17:44:37,289 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 944 transitions. Word has length 16 [2021-02-19 17:44:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:37,289 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 944 transitions. [2021-02-19 17:44:37,289 INFO L481 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) [2021-02-19 17:44:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 944 transitions. [2021-02-19 17:44:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:37,289 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:37,289 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:37,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:37,490 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1084614857, now seen corresponding path program 140 times [2021-02-19 17:44:37,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:37,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359370485] [2021-02-19 17:44:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:37,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359370485] [2021-02-19 17:44:37,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173931303] [2021-02-19 17:44:37,667 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 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 [2021-02-19 17:44:37,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:37,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:37,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:38,082 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 17:44:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:38,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,289 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 [2021-02-19 17:44:38,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,323 INFO L628 ElimStorePlain]: treesize reduction 121, result has 8.3 percent of original size [2021-02-19 17:44:38,324 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:38,324 INFO L518 ElimStorePlain]: Eliminatee v_prenex_89 vanished before elimination [2021-02-19 17:44:38,324 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-02-19 17:44:38,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-02-19 17:44:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:38,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:38,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:44:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812065062] [2021-02-19 17:44:38,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:38,343 INFO L87 Difference]: Start difference. First operand 338 states and 944 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) [2021-02-19 17:44:38,769 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 17:44:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:38,926 INFO L93 Difference]: Finished difference Result 461 states and 1207 transitions. [2021-02-19 17:44:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:38,927 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 [2021-02-19 17:44:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:38,928 INFO L225 Difference]: With dead ends: 461 [2021-02-19 17:44:38,928 INFO L226 Difference]: Without dead ends: 458 [2021-02-19 17:44:38,928 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:44:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-02-19 17:44:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 386. [2021-02-19 17:44:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.857142857142857) internal successors, (1100), 385 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1100 transitions. [2021-02-19 17:44:38,934 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1100 transitions. Word has length 16 [2021-02-19 17:44:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:38,934 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1100 transitions. [2021-02-19 17:44:38,934 INFO L481 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) [2021-02-19 17:44:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1100 transitions. [2021-02-19 17:44:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:38,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:38,935 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:39,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-02-19 17:44:39,150 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -425796347, now seen corresponding path program 141 times [2021-02-19 17:44:39,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:39,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819527984] [2021-02-19 17:44:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:39,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819527984] [2021-02-19 17:44:39,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475184813] [2021-02-19 17:44:39,524 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 [2021-02-19 17:44:39,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:44:39,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:39,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:39,819 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:44:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:40,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,191 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 [2021-02-19 17:44:40,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,232 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-02-19 17:44:40,232 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-02-19 17:44:40,232 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:44:40,232 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:40,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:44:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:40,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:40,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:44:40,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3911357] [2021-02-19 17:44:40,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:40,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:40,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:40,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:40,282 INFO L87 Difference]: Start difference. First operand 386 states and 1100 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) [2021-02-19 17:44:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:40,952 INFO L93 Difference]: Finished difference Result 527 states and 1422 transitions. [2021-02-19 17:44:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:40,953 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 [2021-02-19 17:44:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:40,954 INFO L225 Difference]: With dead ends: 527 [2021-02-19 17:44:40,954 INFO L226 Difference]: Without dead ends: 524 [2021-02-19 17:44:40,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:44:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-02-19 17:44:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 431. [2021-02-19 17:44:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.925581395348837) internal successors, (1258), 430 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1258 transitions. [2021-02-19 17:44:40,961 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1258 transitions. Word has length 16 [2021-02-19 17:44:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:40,961 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1258 transitions. [2021-02-19 17:44:40,961 INFO L481 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) [2021-02-19 17:44:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1258 transitions. [2021-02-19 17:44:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:40,962 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:40,962 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:41,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:41,183 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1076988795, now seen corresponding path program 142 times [2021-02-19 17:44:41,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:41,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117333509] [2021-02-19 17:44:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117333509] [2021-02-19 17:44:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411081528] [2021-02-19 17:44:41,736 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 [2021-02-19 17:44:41,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:41,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:41,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,295 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 [2021-02-19 17:44:42,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,306 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 [2021-02-19 17:44:42,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,366 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-02-19 17:44:42,366 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:42,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,374 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 [2021-02-19 17:44:42,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,395 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 21 treesize of output 13 [2021-02-19 17:44:42,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:42,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:42,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:44:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:42,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:42,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:42,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228980233] [2021-02-19 17:44:42,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:42,465 INFO L87 Difference]: Start difference. First operand 431 states and 1258 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) [2021-02-19 17:44:42,727 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 17:44:42,967 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-02-19 17:44:43,159 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-02-19 17:44:43,414 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-02-19 17:44:43,624 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-02-19 17:44:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:44,113 INFO L93 Difference]: Finished difference Result 457 states and 1305 transitions. [2021-02-19 17:44:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:44,114 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 [2021-02-19 17:44:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:44,114 INFO L225 Difference]: With dead ends: 457 [2021-02-19 17:44:44,114 INFO L226 Difference]: Without dead ends: 453 [2021-02-19 17:44:44,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:44:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-02-19 17:44:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 429. [2021-02-19 17:44:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.9228971962616823) internal successors, (1251), 428 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1251 transitions. [2021-02-19 17:44:44,118 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1251 transitions. Word has length 16 [2021-02-19 17:44:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:44,119 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1251 transitions. [2021-02-19 17:44:44,119 INFO L481 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) [2021-02-19 17:44:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1251 transitions. [2021-02-19 17:44:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:44,119 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:44,119 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:44,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1046 [2021-02-19 17:44:44,320 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:44,320 INFO L82 PathProgramCache]: Analyzing trace with hash -3903415, now seen corresponding path program 143 times [2021-02-19 17:44:44,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:44,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038781559] [2021-02-19 17:44:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038781559] [2021-02-19 17:44:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910751530] [2021-02-19 17:44:44,980 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 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 [2021-02-19 17:44:45,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:44:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:45,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:45,550 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 [2021-02-19 17:44:45,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:45,576 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-02-19 17:44:45,577 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:45,577 INFO L518 ElimStorePlain]: Eliminatee v_prenex_100 vanished before elimination [2021-02-19 17:44:45,577 INFO L518 ElimStorePlain]: Eliminatee v_prenex_101 vanished before elimination [2021-02-19 17:44:45,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:45,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:44:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:45,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:45,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:45,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880424239] [2021-02-19 17:44:45,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:45,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:45,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:45,620 INFO L87 Difference]: Start difference. First operand 429 states and 1251 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) [2021-02-19 17:44:46,134 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 17:44:46,296 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-02-19 17:44:46,480 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-19 17:44:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:46,683 INFO L93 Difference]: Finished difference Result 448 states and 1287 transitions. [2021-02-19 17:44:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:44:46,684 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 [2021-02-19 17:44:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:46,684 INFO L225 Difference]: With dead ends: 448 [2021-02-19 17:44:46,684 INFO L226 Difference]: Without dead ends: 445 [2021-02-19 17:44:46,685 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:44:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-02-19 17:44:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 429. [2021-02-19 17:44:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.9228971962616823) internal successors, (1251), 428 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1251 transitions. [2021-02-19 17:44:46,689 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1251 transitions. Word has length 16 [2021-02-19 17:44:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:46,689 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1251 transitions. [2021-02-19 17:44:46,689 INFO L481 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) [2021-02-19 17:44:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1251 transitions. [2021-02-19 17:44:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:46,689 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:46,689 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:46,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:46,890 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash 439009571, now seen corresponding path program 144 times [2021-02-19 17:44:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:46,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143697060] [2021-02-19 17:44:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:47,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143697060] [2021-02-19 17:44:47,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111415550] [2021-02-19 17:44:47,610 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 [2021-02-19 17:44:47,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:44:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:47,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:48,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:48,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:48,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:48,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:48,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:48,280 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 [2021-02-19 17:44:48,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:48,306 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-02-19 17:44:48,307 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:44:48,307 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:48,307 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-02-19 17:44:48,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:44:48,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:44:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:48,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:48,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132807521] [2021-02-19 17:44:48,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:48,351 INFO L87 Difference]: Start difference. First operand 429 states and 1251 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) [2021-02-19 17:44:48,731 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 17:44:49,118 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2021-02-19 17:44:49,436 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-02-19 17:44:49,919 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 61 [2021-02-19 17:44:50,309 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-02-19 17:44:50,821 WARN L202 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 65 [2021-02-19 17:44:51,207 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-02-19 17:44:51,931 WARN L202 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 102 [2021-02-19 17:44:52,207 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 17:44:52,620 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-02-19 17:44:52,981 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-02-19 17:44:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:53,103 INFO L93 Difference]: Finished difference Result 619 states and 1727 transitions. [2021-02-19 17:44:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:44:53,103 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 [2021-02-19 17:44:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:53,104 INFO L225 Difference]: With dead ends: 619 [2021-02-19 17:44:53,104 INFO L226 Difference]: Without dead ends: 613 [2021-02-19 17:44:53,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:44:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-02-19 17:44:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 430. [2021-02-19 17:44:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.923076923076923) internal successors, (1254), 429 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1254 transitions. [2021-02-19 17:44:53,110 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1254 transitions. Word has length 16 [2021-02-19 17:44:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:53,110 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1254 transitions. [2021-02-19 17:44:53,110 INFO L481 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) [2021-02-19 17:44:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1254 transitions. [2021-02-19 17:44:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:53,110 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:53,110 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:53,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:53,311 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash 304684107, now seen corresponding path program 145 times [2021-02-19 17:44:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:53,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465829715] [2021-02-19 17:44:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465829715] [2021-02-19 17:44:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38559946] [2021-02-19 17:44:53,414 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 [2021-02-19 17:44:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:44:53,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:53,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:53,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:44:53,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:53,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:53,563 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 [2021-02-19 17:44:53,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:53,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:44:53,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:53,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,609 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-02-19 17:44:53,609 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:53,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:44:53,610 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-02-19 17:44:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:53,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:53,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 17:44:53,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069153709] [2021-02-19 17:44:53,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:53,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:53,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:53,676 INFO L87 Difference]: Start difference. First operand 430 states and 1254 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) [2021-02-19 17:44:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:54,060 INFO L93 Difference]: Finished difference Result 483 states and 1358 transitions. [2021-02-19 17:44:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:44:54,061 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 [2021-02-19 17:44:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:54,061 INFO L225 Difference]: With dead ends: 483 [2021-02-19 17:44:54,061 INFO L226 Difference]: Without dead ends: 479 [2021-02-19 17:44:54,061 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:44:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-02-19 17:44:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 430. [2021-02-19 17:44:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.9207459207459205) internal successors, (1253), 429 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1253 transitions. [2021-02-19 17:44:54,066 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1253 transitions. Word has length 16 [2021-02-19 17:44:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:54,066 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1253 transitions. [2021-02-19 17:44:54,066 INFO L481 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) [2021-02-19 17:44:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1253 transitions. [2021-02-19 17:44:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:54,066 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:54,066 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:54,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1096 [2021-02-19 17:44:54,267 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1213943803, now seen corresponding path program 146 times [2021-02-19 17:44:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:54,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460930748] [2021-02-19 17:44:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:54,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460930748] [2021-02-19 17:44:54,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525467270] [2021-02-19 17:44:54,800 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 [2021-02-19 17:44:54,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:54,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:54,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:54,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:55,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:55,495 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 [2021-02-19 17:44:55,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:55,510 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 [2021-02-19 17:44:55,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:55,578 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-02-19 17:44:55,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:55,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:55,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:44:55,586 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 [2021-02-19 17:44:55,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:55,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:55,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:55,608 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 21 treesize of output 13 [2021-02-19 17:44:55,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:55,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:55,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:44:55,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:44:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:55,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:55,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:44:55,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302170934] [2021-02-19 17:44:55,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:44:55,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:44:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:55,679 INFO L87 Difference]: Start difference. First operand 430 states and 1253 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) [2021-02-19 17:44:56,006 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 17:44:56,184 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-02-19 17:44:56,446 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-02-19 17:44:56,669 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-02-19 17:44:56,874 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-02-19 17:44:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:56,976 INFO L93 Difference]: Finished difference Result 494 states and 1381 transitions. [2021-02-19 17:44:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:44:56,976 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 [2021-02-19 17:44:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:56,977 INFO L225 Difference]: With dead ends: 494 [2021-02-19 17:44:56,977 INFO L226 Difference]: Without dead ends: 491 [2021-02-19 17:44:56,977 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:44:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-02-19 17:44:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 430. [2021-02-19 17:44:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.9207459207459205) internal successors, (1253), 429 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1253 transitions. [2021-02-19 17:44:56,981 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1253 transitions. Word has length 16 [2021-02-19 17:44:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:56,981 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1253 transitions. [2021-02-19 17:44:56,981 INFO L481 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) [2021-02-19 17:44:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1253 transitions. [2021-02-19 17:44:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:56,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:56,982 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:57,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-02-19 17:44:57,182 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:57,182 INFO L82 PathProgramCache]: Analyzing trace with hash -283061215, now seen corresponding path program 147 times [2021-02-19 17:44:57,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:57,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757046486] [2021-02-19 17:44:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:57,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757046486] [2021-02-19 17:44:57,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251262803] [2021-02-19 17:44:57,328 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 [2021-02-19 17:44:57,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:44:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:44:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:57,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:57,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:44:57,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:57,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:57,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,570 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 [2021-02-19 17:44:57,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:44:57,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,625 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:44:57,625 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:57,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:44:57,627 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:44:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:57,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:57,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:44:57,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137724099] [2021-02-19 17:44:57,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:57,700 INFO L87 Difference]: Start difference. First operand 430 states and 1253 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) [2021-02-19 17:44:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:58,286 INFO L93 Difference]: Finished difference Result 484 states and 1361 transitions. [2021-02-19 17:44:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:58,287 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 [2021-02-19 17:44:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:58,288 INFO L225 Difference]: With dead ends: 484 [2021-02-19 17:44:58,288 INFO L226 Difference]: Without dead ends: 481 [2021-02-19 17:44:58,288 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:44:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-02-19 17:44:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 430. [2021-02-19 17:44:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.9184149184149186) internal successors, (1252), 429 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1252 transitions. [2021-02-19 17:44:58,295 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1252 transitions. Word has length 16 [2021-02-19 17:44:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:58,295 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1252 transitions. [2021-02-19 17:44:58,295 INFO L481 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) [2021-02-19 17:44:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1252 transitions. [2021-02-19 17:44:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:44:58,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:58,296 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:58,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-02-19 17:44:58,517 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1920001379, now seen corresponding path program 148 times [2021-02-19 17:44:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:58,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940643379] [2021-02-19 17:44:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:58,857 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-02-19 17:44:59,081 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 17:44:59,297 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-19 17:44:59,427 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 17:44:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:59,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940643379] [2021-02-19 17:44:59,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868858112] [2021-02-19 17:44:59,522 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 [2021-02-19 17:44:59,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:59,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:44:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:00,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:00,234 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 [2021-02-19 17:45:00,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:00,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:00,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:00,246 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 [2021-02-19 17:45:00,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:00,268 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-02-19 17:45:00,268 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:00,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-02-19 17:45:00,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-02-19 17:45:00,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:00,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:45:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:00,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:00,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548463503] [2021-02-19 17:45:00,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:00,314 INFO L87 Difference]: Start difference. First operand 430 states and 1252 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) [2021-02-19 17:45:00,750 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 17:45:00,898 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-02-19 17:45:01,152 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 17:45:01,410 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 17:45:01,665 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-02-19 17:45:02,008 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2021-02-19 17:45:02,151 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-02-19 17:45:02,499 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-02-19 17:45:02,825 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-02-19 17:45:03,100 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-02-19 17:45:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:03,125 INFO L93 Difference]: Finished difference Result 504 states and 1395 transitions. [2021-02-19 17:45:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:45:03,126 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 [2021-02-19 17:45:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:03,126 INFO L225 Difference]: With dead ends: 504 [2021-02-19 17:45:03,126 INFO L226 Difference]: Without dead ends: 497 [2021-02-19 17:45:03,127 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:45:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-02-19 17:45:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 436. [2021-02-19 17:45:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.9195402298850577) internal successors, (1270), 435 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) [2021-02-19 17:45:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1270 transitions. [2021-02-19 17:45:03,131 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1270 transitions. Word has length 16 [2021-02-19 17:45:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:03,131 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 1270 transitions. [2021-02-19 17:45:03,131 INFO L481 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) [2021-02-19 17:45:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1270 transitions. [2021-02-19 17:45:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:03,132 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:03,132 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:03,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:03,344 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash -820916793, now seen corresponding path program 149 times [2021-02-19 17:45:03,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:03,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310305669] [2021-02-19 17:45:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:03,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310305669] [2021-02-19 17:45:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167520665] [2021-02-19 17:45:03,462 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 [2021-02-19 17:45:03,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:45:03,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:03,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:45:03,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,679 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 [2021-02-19 17:45:03,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,683 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 [2021-02-19 17:45:03,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,688 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 8 treesize of output 6 [2021-02-19 17:45:03,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:03,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,699 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 [2021-02-19 17:45:03,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,747 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:45:03,747 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:03,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:45:03,749 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:45:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:03,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:03,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:03,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982803368] [2021-02-19 17:45:03,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:03,821 INFO L87 Difference]: Start difference. First operand 436 states and 1270 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) [2021-02-19 17:45:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:04,168 INFO L93 Difference]: Finished difference Result 485 states and 1369 transitions. [2021-02-19 17:45:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:45:04,168 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 [2021-02-19 17:45:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:04,169 INFO L225 Difference]: With dead ends: 485 [2021-02-19 17:45:04,169 INFO L226 Difference]: Without dead ends: 481 [2021-02-19 17:45:04,169 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:45:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-02-19 17:45:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 436. [2021-02-19 17:45:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.914942528735632) internal successors, (1268), 435 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1268 transitions. [2021-02-19 17:45:04,173 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1268 transitions. Word has length 16 [2021-02-19 17:45:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:04,173 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 1268 transitions. [2021-02-19 17:45:04,173 INFO L481 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) [2021-02-19 17:45:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1268 transitions. [2021-02-19 17:45:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:04,174 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:04,174 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:04,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1146,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:04,374 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2135323579, now seen corresponding path program 150 times [2021-02-19 17:45:04,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:04,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122355427] [2021-02-19 17:45:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122355427] [2021-02-19 17:45:04,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879402920] [2021-02-19 17:45:04,735 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 [2021-02-19 17:45:04,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:45:04,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:04,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:05,204 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:45:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:05,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:05,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:05,476 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 [2021-02-19 17:45:05,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:05,502 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-02-19 17:45:05,502 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:45:05,502 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:05,502 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-02-19 17:45:05,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:05,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:45:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:05,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:05,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:45:05,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118031258] [2021-02-19 17:45:05,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:05,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:05,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:05,537 INFO L87 Difference]: Start difference. First operand 436 states and 1268 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) [2021-02-19 17:45:06,485 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 17:45:06,645 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 17:45:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:06,988 INFO L93 Difference]: Finished difference Result 555 states and 1505 transitions. [2021-02-19 17:45:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:45:06,989 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 [2021-02-19 17:45:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:06,990 INFO L225 Difference]: With dead ends: 555 [2021-02-19 17:45:06,990 INFO L226 Difference]: Without dead ends: 541 [2021-02-19 17:45:06,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:45:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-02-19 17:45:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 448. [2021-02-19 17:45:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.9194630872483223) internal successors, (1305), 447 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1305 transitions. [2021-02-19 17:45:06,994 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1305 transitions. Word has length 16 [2021-02-19 17:45:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:06,994 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 1305 transitions. [2021-02-19 17:45:06,994 INFO L481 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) [2021-02-19 17:45:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1305 transitions. [2021-02-19 17:45:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:06,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:06,995 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:07,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-02-19 17:45:07,195 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:07,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2127593181, now seen corresponding path program 151 times [2021-02-19 17:45:07,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:07,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670655028] [2021-02-19 17:45:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:07,879 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-02-19 17:45:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:07,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670655028] [2021-02-19 17:45:07,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975422297] [2021-02-19 17:45:07,981 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 [2021-02-19 17:45:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:08,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:08,492 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:45:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,687 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 [2021-02-19 17:45:08,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,703 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 [2021-02-19 17:45:08,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:08,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,711 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 [2021-02-19 17:45:08,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,733 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:45:08,733 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:08,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-02-19 17:45:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:08,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:08,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863499714] [2021-02-19 17:45:08,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:08,774 INFO L87 Difference]: Start difference. First operand 448 states and 1305 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) [2021-02-19 17:45:09,318 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 17:45:09,773 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-02-19 17:45:10,028 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 17:45:10,250 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-02-19 17:45:10,696 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-02-19 17:45:10,837 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-02-19 17:45:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:11,108 INFO L93 Difference]: Finished difference Result 556 states and 1520 transitions. [2021-02-19 17:45:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:45:11,109 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 [2021-02-19 17:45:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:11,110 INFO L225 Difference]: With dead ends: 556 [2021-02-19 17:45:11,110 INFO L226 Difference]: Without dead ends: 552 [2021-02-19 17:45:11,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:45:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-02-19 17:45:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 435. [2021-02-19 17:45:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8986175115207375) internal successors, (1258), 434 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1258 transitions. [2021-02-19 17:45:11,115 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1258 transitions. Word has length 16 [2021-02-19 17:45:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:11,115 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1258 transitions. [2021-02-19 17:45:11,115 INFO L481 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) [2021-02-19 17:45:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1258 transitions. [2021-02-19 17:45:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:11,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:11,115 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:11,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1171,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:11,316 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:11,316 INFO L82 PathProgramCache]: Analyzing trace with hash -328145523, now seen corresponding path program 152 times [2021-02-19 17:45:11,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:11,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134928534] [2021-02-19 17:45:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:11,588 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 17:45:12,094 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-02-19 17:45:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:12,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134928534] [2021-02-19 17:45:12,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540234331] [2021-02-19 17:45:12,193 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 [2021-02-19 17:45:12,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:12,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:12,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:12,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:12,912 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 [2021-02-19 17:45:12,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:12,924 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 [2021-02-19 17:45:12,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:12,991 INFO L628 ElimStorePlain]: treesize reduction 84, result has 48.5 percent of original size [2021-02-19 17:45:12,992 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:12,997 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 [2021-02-19 17:45:12,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:13,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:13,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:13,019 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 21 treesize of output 13 [2021-02-19 17:45:13,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:13,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:13,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:13,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:221, output treesize:22 [2021-02-19 17:45:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:13,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:13,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:13,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784048101] [2021-02-19 17:45:13,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:13,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:13,097 INFO L87 Difference]: Start difference. First operand 435 states and 1258 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) [2021-02-19 17:45:13,380 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-02-19 17:45:13,720 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-02-19 17:45:13,935 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 17:45:14,331 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-02-19 17:45:14,598 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-02-19 17:45:14,902 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-02-19 17:45:15,122 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-02-19 17:45:15,451 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-02-19 17:45:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:15,469 INFO L93 Difference]: Finished difference Result 479 states and 1336 transitions. [2021-02-19 17:45:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:45:15,470 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 [2021-02-19 17:45:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:15,470 INFO L225 Difference]: With dead ends: 479 [2021-02-19 17:45:15,470 INFO L226 Difference]: Without dead ends: 470 [2021-02-19 17:45:15,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:45:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-02-19 17:45:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 435. [2021-02-19 17:45:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8986175115207375) internal successors, (1258), 434 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1258 transitions. [2021-02-19 17:45:15,475 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1258 transitions. Word has length 16 [2021-02-19 17:45:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:15,475 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1258 transitions. [2021-02-19 17:45:15,475 INFO L481 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) [2021-02-19 17:45:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1258 transitions. [2021-02-19 17:45:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:15,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:15,475 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:15,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:15,676 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1489167637, now seen corresponding path program 153 times [2021-02-19 17:45:15,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:15,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270232303] [2021-02-19 17:45:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:16,089 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-02-19 17:45:16,233 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-02-19 17:45:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:16,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270232303] [2021-02-19 17:45:16,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483071995] [2021-02-19 17:45:16,435 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 [2021-02-19 17:45:16,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:45:16,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:16,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:16,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:17,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:17,143 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 [2021-02-19 17:45:17,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:17,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:17,156 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 [2021-02-19 17:45:17,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:17,224 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-02-19 17:45:17,224 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:17,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:17,233 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 49 treesize of output 35 [2021-02-19 17:45:17,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:17,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:17,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:17,258 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 10 treesize of output 6 [2021-02-19 17:45:17,260 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:17,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:17,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:17,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:45:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:17,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:17,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:17,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203886740] [2021-02-19 17:45:17,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:17,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:17,337 INFO L87 Difference]: Start difference. First operand 435 states and 1258 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) [2021-02-19 17:45:17,751 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 17:45:18,263 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-02-19 17:45:18,621 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2021-02-19 17:45:18,982 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-02-19 17:45:19,299 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-02-19 17:45:19,606 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-02-19 17:45:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:19,628 INFO L93 Difference]: Finished difference Result 474 states and 1330 transitions. [2021-02-19 17:45:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:45:19,629 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 [2021-02-19 17:45:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:19,630 INFO L225 Difference]: With dead ends: 474 [2021-02-19 17:45:19,630 INFO L226 Difference]: Without dead ends: 464 [2021-02-19 17:45:19,630 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:45:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-02-19 17:45:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 440. [2021-02-19 17:45:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.8952164009111616) internal successors, (1271), 439 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1271 transitions. [2021-02-19 17:45:19,637 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1271 transitions. Word has length 16 [2021-02-19 17:45:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:19,637 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1271 transitions. [2021-02-19 17:45:19,637 INFO L481 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) [2021-02-19 17:45:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1271 transitions. [2021-02-19 17:45:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:19,638 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:19,638 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:19,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1207,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:19,838 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:19,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1249525299, now seen corresponding path program 154 times [2021-02-19 17:45:19,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:19,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012665661] [2021-02-19 17:45:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:20,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012665661] [2021-02-19 17:45:20,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707736334] [2021-02-19 17:45:20,201 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 [2021-02-19 17:45:20,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:20,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:20,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:20,701 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:45:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,985 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 [2021-02-19 17:45:20,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:20,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,997 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 [2021-02-19 17:45:20,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:21,016 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-02-19 17:45:21,016 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:21,016 INFO L518 ElimStorePlain]: Eliminatee v_prenex_133 vanished before elimination [2021-02-19 17:45:21,016 INFO L518 ElimStorePlain]: Eliminatee v_prenex_134 vanished before elimination [2021-02-19 17:45:21,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:21,017 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:45:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:21,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-02-19 17:45:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089788457] [2021-02-19 17:45:21,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:21,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:21,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:21,031 INFO L87 Difference]: Start difference. First operand 440 states and 1271 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) [2021-02-19 17:45:21,300 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 17:45:21,434 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 17:45:22,117 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 17:45:22,362 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 17:45:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:22,642 INFO L93 Difference]: Finished difference Result 518 states and 1421 transitions. [2021-02-19 17:45:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:45:22,643 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 [2021-02-19 17:45:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:22,644 INFO L225 Difference]: With dead ends: 518 [2021-02-19 17:45:22,644 INFO L226 Difference]: Without dead ends: 512 [2021-02-19 17:45:22,644 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:45:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-02-19 17:45:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 440. [2021-02-19 17:45:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.888382687927107) internal successors, (1268), 439 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1268 transitions. [2021-02-19 17:45:22,648 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1268 transitions. Word has length 16 [2021-02-19 17:45:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:22,648 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1268 transitions. [2021-02-19 17:45:22,648 INFO L481 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) [2021-02-19 17:45:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1268 transitions. [2021-02-19 17:45:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:22,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:22,649 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:22,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-02-19 17:45:22,850 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:22,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1241794901, now seen corresponding path program 155 times [2021-02-19 17:45:22,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:22,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807481836] [2021-02-19 17:45:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:23,357 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 17:45:23,597 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-02-19 17:45:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807481836] [2021-02-19 17:45:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675429142] [2021-02-19 17:45:23,843 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 [2021-02-19 17:45:23,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:45:23,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:23,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:24,448 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 17:45:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,673 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 [2021-02-19 17:45:24,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,690 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 [2021-02-19 17:45:24,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,705 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 [2021-02-19 17:45:24,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,715 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 [2021-02-19 17:45:24,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,741 INFO L628 ElimStorePlain]: treesize reduction 79, result has 16.0 percent of original size [2021-02-19 17:45:24,741 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:24,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,742 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:205, output treesize:11 [2021-02-19 17:45:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:24,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:24,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:24,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618859940] [2021-02-19 17:45:24,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:24,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:24,787 INFO L87 Difference]: Start difference. First operand 440 states and 1268 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) [2021-02-19 17:45:25,097 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 17:45:25,352 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-19 17:45:25,688 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-02-19 17:45:26,058 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-02-19 17:45:26,457 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 17:45:26,714 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-02-19 17:45:26,913 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 17:45:27,178 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-02-19 17:45:27,770 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-19 17:45:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:27,921 INFO L93 Difference]: Finished difference Result 537 states and 1465 transitions. [2021-02-19 17:45:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:45:27,922 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 [2021-02-19 17:45:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:27,922 INFO L225 Difference]: With dead ends: 537 [2021-02-19 17:45:27,922 INFO L226 Difference]: Without dead ends: 531 [2021-02-19 17:45:27,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:45:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-02-19 17:45:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 447. [2021-02-19 17:45:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.901345291479821) internal successors, (1294), 446 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1294 transitions. [2021-02-19 17:45:27,927 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1294 transitions. Word has length 16 [2021-02-19 17:45:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:27,927 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1294 transitions. [2021-02-19 17:45:27,927 INFO L481 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) [2021-02-19 17:45:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1294 transitions. [2021-02-19 17:45:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:27,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:27,928 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-02-19 17:45:28,128 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1711708071, now seen corresponding path program 156 times [2021-02-19 17:45:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663296276] [2021-02-19 17:45:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663296276] [2021-02-19 17:45:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706153953] [2021-02-19 17:45:28,430 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 [2021-02-19 17:45:28,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:28,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:28,810 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:45:29,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:29,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:29,290 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 [2021-02-19 17:45:29,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:29,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:29,304 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 [2021-02-19 17:45:29,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,327 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-02-19 17:45:29,327 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:29,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_140 vanished before elimination [2021-02-19 17:45:29,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-02-19 17:45:29,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:45:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:29,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:29,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-02-19 17:45:29,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902294139] [2021-02-19 17:45:29,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:29,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:29,343 INFO L87 Difference]: Start difference. First operand 447 states and 1294 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) [2021-02-19 17:45:29,781 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-02-19 17:45:30,010 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-02-19 17:45:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:30,290 INFO L93 Difference]: Finished difference Result 508 states and 1409 transitions. [2021-02-19 17:45:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:45:30,291 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 [2021-02-19 17:45:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:30,291 INFO L225 Difference]: With dead ends: 508 [2021-02-19 17:45:30,291 INFO L226 Difference]: Without dead ends: 500 [2021-02-19 17:45:30,292 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:45:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-02-19 17:45:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 447. [2021-02-19 17:45:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.899103139013453) internal successors, (1293), 446 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1293 transitions. [2021-02-19 17:45:30,296 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1293 transitions. Word has length 16 [2021-02-19 17:45:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:30,296 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1293 transitions. [2021-02-19 17:45:30,296 INFO L481 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) [2021-02-19 17:45:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1293 transitions. [2021-02-19 17:45:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:30,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:30,297 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:30,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:30,497 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:30,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1270531507, now seen corresponding path program 157 times [2021-02-19 17:45:30,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:30,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006678500] [2021-02-19 17:45:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:30,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006678500] [2021-02-19 17:45:30,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139407829] [2021-02-19 17:45:30,734 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 [2021-02-19 17:45:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:30,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:31,042 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:45:31,181 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-02-19 17:45:31,375 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:45:31,555 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 17:45:31,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:31,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:31,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,699 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 [2021-02-19 17:45:31,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:31,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,715 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 [2021-02-19 17:45:31,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,739 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-02-19 17:45:31,739 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:31,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-02-19 17:45:31,740 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-02-19 17:45:31,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-02-19 17:45:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:31,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:31,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358355645] [2021-02-19 17:45:31,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:31,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:31,756 INFO L87 Difference]: Start difference. First operand 447 states and 1293 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) [2021-02-19 17:45:32,189 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 17:45:32,517 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 17:45:32,853 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 17:45:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:33,022 INFO L93 Difference]: Finished difference Result 521 states and 1428 transitions. [2021-02-19 17:45:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:45:33,023 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 [2021-02-19 17:45:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:33,024 INFO L225 Difference]: With dead ends: 521 [2021-02-19 17:45:33,024 INFO L226 Difference]: Without dead ends: 514 [2021-02-19 17:45:33,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:45:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-02-19 17:45:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 435. [2021-02-19 17:45:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8847926267281108) internal successors, (1252), 434 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1252 transitions. [2021-02-19 17:45:33,028 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1252 transitions. Word has length 16 [2021-02-19 17:45:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:33,028 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1252 transitions. [2021-02-19 17:45:33,028 INFO L481 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) [2021-02-19 17:45:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1252 transitions. [2021-02-19 17:45:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:33,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:33,029 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:33,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-02-19 17:45:33,231 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1542761191, now seen corresponding path program 158 times [2021-02-19 17:45:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:33,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078072349] [2021-02-19 17:45:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:33,545 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 17:45:33,724 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 17:45:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:33,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078072349] [2021-02-19 17:45:33,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082624124] [2021-02-19 17:45:33,864 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 [2021-02-19 17:45:33,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:33,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:34,198 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:45:34,350 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 17:45:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,668 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 [2021-02-19 17:45:34,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,682 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 [2021-02-19 17:45:34,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,702 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 [2021-02-19 17:45:34,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,729 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-02-19 17:45:34,730 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:34,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,731 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-02-19 17:45:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:34,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:34,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:45:34,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522002849] [2021-02-19 17:45:34,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:34,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:34,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:34,783 INFO L87 Difference]: Start difference. First operand 435 states and 1252 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) [2021-02-19 17:45:35,093 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 17:45:35,255 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 17:45:35,540 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-02-19 17:45:35,724 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 17:45:36,061 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-02-19 17:45:36,248 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-02-19 17:45:36,412 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 17:45:36,714 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-02-19 17:45:36,871 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 17:45:37,161 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 17:45:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:37,455 INFO L93 Difference]: Finished difference Result 524 states and 1432 transitions. [2021-02-19 17:45:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:45:37,456 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 [2021-02-19 17:45:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:37,457 INFO L225 Difference]: With dead ends: 524 [2021-02-19 17:45:37,457 INFO L226 Difference]: Without dead ends: 521 [2021-02-19 17:45:37,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:45:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-02-19 17:45:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 448. [2021-02-19 17:45:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.9038031319910513) internal successors, (1298), 447 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1298 transitions. [2021-02-19 17:45:37,462 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1298 transitions. Word has length 16 [2021-02-19 17:45:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:37,462 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 1298 transitions. [2021-02-19 17:45:37,462 INFO L481 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) [2021-02-19 17:45:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1298 transitions. [2021-02-19 17:45:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:37,462 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:37,462 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:37,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1305,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:37,666 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1361797381, now seen corresponding path program 159 times [2021-02-19 17:45:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:37,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047634313] [2021-02-19 17:45:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:38,169 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-02-19 17:45:38,376 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 17:45:38,577 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 17:45:38,746 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-02-19 17:45:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:38,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047634313] [2021-02-19 17:45:38,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852857954] [2021-02-19 17:45:38,865 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 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 [2021-02-19 17:45:38,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:45:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:38,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,581 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 [2021-02-19 17:45:39,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,595 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 [2021-02-19 17:45:39,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,679 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-02-19 17:45:39,679 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:39,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:39,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,690 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 [2021-02-19 17:45:39,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:39,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,719 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 10 treesize of output 6 [2021-02-19 17:45:39,722 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:39,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:39,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:39,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:45:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:39,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:39,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:39,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362160227] [2021-02-19 17:45:39,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:39,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:39,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:39,817 INFO L87 Difference]: Start difference. First operand 448 states and 1298 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) [2021-02-19 17:45:40,552 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-02-19 17:45:40,930 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-02-19 17:45:41,186 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-02-19 17:45:41,465 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 17:45:41,744 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 17:45:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:41,830 INFO L93 Difference]: Finished difference Result 479 states and 1351 transitions. [2021-02-19 17:45:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:45:41,831 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 [2021-02-19 17:45:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:41,832 INFO L225 Difference]: With dead ends: 479 [2021-02-19 17:45:41,832 INFO L226 Difference]: Without dead ends: 473 [2021-02-19 17:45:41,832 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:45:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-02-19 17:45:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 449. [2021-02-19 17:45:41,836 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) [2021-02-19 17:45:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1301 transitions. [2021-02-19 17:45:41,836 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1301 transitions. Word has length 16 [2021-02-19 17:45:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:41,836 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1301 transitions. [2021-02-19 17:45:41,836 INFO L481 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) [2021-02-19 17:45:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1301 transitions. [2021-02-19 17:45:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:41,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:41,837 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:42,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1327 [2021-02-19 17:45:42,037 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash 200775267, now seen corresponding path program 160 times [2021-02-19 17:45:42,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078671131] [2021-02-19 17:45:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:42,450 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-02-19 17:45:42,704 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-02-19 17:45:42,876 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 17:45:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:43,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078671131] [2021-02-19 17:45:43,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069840039] [2021-02-19 17:45:43,065 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 [2021-02-19 17:45:43,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:43,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:43,419 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 17:45:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,790 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 [2021-02-19 17:45:43,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,805 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 [2021-02-19 17:45:43,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,888 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.2 percent of original size [2021-02-19 17:45:43,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,893 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 10 treesize of output 6 [2021-02-19 17:45:43,896 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:43,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:43,930 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 [2021-02-19 17:45:43,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,951 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-02-19 17:45:43,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:43,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-02-19 17:45:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:44,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:44,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127152020] [2021-02-19 17:45:44,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:44,020 INFO L87 Difference]: Start difference. First operand 449 states and 1301 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) [2021-02-19 17:45:44,494 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-02-19 17:45:44,947 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-02-19 17:45:45,286 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 68 [2021-02-19 17:45:45,651 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2021-02-19 17:45:46,045 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-02-19 17:45:46,406 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2021-02-19 17:45:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:46,438 INFO L93 Difference]: Finished difference Result 478 states and 1349 transitions. [2021-02-19 17:45:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:45:46,439 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 [2021-02-19 17:45:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:46,440 INFO L225 Difference]: With dead ends: 478 [2021-02-19 17:45:46,440 INFO L226 Difference]: Without dead ends: 468 [2021-02-19 17:45:46,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:45:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-02-19 17:45:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 450. [2021-02-19 17:45:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.8997772828507795) internal successors, (1302), 449 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1302 transitions. [2021-02-19 17:45:46,445 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1302 transitions. Word has length 16 [2021-02-19 17:45:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:46,445 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 1302 transitions. [2021-02-19 17:45:46,445 INFO L481 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) [2021-02-19 17:45:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1302 transitions. [2021-02-19 17:45:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:46,445 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:46,445 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:46,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-02-19 17:45:46,646 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash 448148003, now seen corresponding path program 161 times [2021-02-19 17:45:46,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:46,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562940562] [2021-02-19 17:45:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:46,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562940562] [2021-02-19 17:45:46,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769234605] [2021-02-19 17:45:46,861 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 [2021-02-19 17:45:46,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:45:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:46,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:47,223 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-02-19 17:45:47,424 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:45:47,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,650 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 [2021-02-19 17:45:47,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,669 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 [2021-02-19 17:45:47,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:47,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,681 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 [2021-02-19 17:45:47,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,708 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-02-19 17:45:47,708 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:47,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,709 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-02-19 17:45:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:47,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:47,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068792212] [2021-02-19 17:45:47,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:47,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:47,728 INFO L87 Difference]: Start difference. First operand 450 states and 1302 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) [2021-02-19 17:45:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,292 INFO L93 Difference]: Finished difference Result 553 states and 1505 transitions. [2021-02-19 17:45:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:45:48,293 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 [2021-02-19 17:45:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,294 INFO L225 Difference]: With dead ends: 553 [2021-02-19 17:45:48,294 INFO L226 Difference]: Without dead ends: 550 [2021-02-19 17:45:48,294 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-02-19 17:45:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 452. [2021-02-19 17:45:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.902439024390244) internal successors, (1309), 451 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1309 transitions. [2021-02-19 17:45:48,302 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1309 transitions. Word has length 16 [2021-02-19 17:45:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,302 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 1309 transitions. [2021-02-19 17:45:48,302 INFO L481 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) [2021-02-19 17:45:48,302 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1309 transitions. [2021-02-19 17:45:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:48,303 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,303 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:48,503 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash -450417181, now seen corresponding path program 162 times [2021-02-19 17:45:48,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480500262] [2021-02-19 17:45:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480500262] [2021-02-19 17:45:49,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669381153] [2021-02-19 17:45:49,055 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 [2021-02-19 17:45:49,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:45:49,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:49,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:49,371 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:45:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,877 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 [2021-02-19 17:45:49,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:49,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,893 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 [2021-02-19 17:45:49,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,926 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-02-19 17:45:49,927 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:49,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_162 vanished before elimination [2021-02-19 17:45:49,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_163 vanished before elimination [2021-02-19 17:45:49,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,928 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-02-19 17:45:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:49,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:45:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291947025] [2021-02-19 17:45:49,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:49,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:49,974 INFO L87 Difference]: Start difference. First operand 452 states and 1309 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) [2021-02-19 17:45:50,532 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-02-19 17:45:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:50,800 INFO L93 Difference]: Finished difference Result 513 states and 1425 transitions. [2021-02-19 17:45:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:45:50,801 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 [2021-02-19 17:45:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:50,802 INFO L225 Difference]: With dead ends: 513 [2021-02-19 17:45:50,802 INFO L226 Difference]: Without dead ends: 507 [2021-02-19 17:45:50,802 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:45:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-02-19 17:45:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 457. [2021-02-19 17:45:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.901315789473684) internal successors, (1323), 456 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1323 transitions. [2021-02-19 17:45:50,806 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1323 transitions. Word has length 16 [2021-02-19 17:45:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:50,807 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 1323 transitions. [2021-02-19 17:45:50,807 INFO L481 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) [2021-02-19 17:45:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1323 transitions. [2021-02-19 17:45:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:50,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:50,807 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:51,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:51,008 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:51,008 INFO L82 PathProgramCache]: Analyzing trace with hash -231781051, now seen corresponding path program 163 times [2021-02-19 17:45:51,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:51,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545719849] [2021-02-19 17:45:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:51,306 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 17:45:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545719849] [2021-02-19 17:45:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589362351] [2021-02-19 17:45:51,467 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 [2021-02-19 17:45:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:51,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:52,011 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 17:45:52,230 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 17:45:52,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:52,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,375 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 [2021-02-19 17:45:52,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:52,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:52,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,389 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 [2021-02-19 17:45:52,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,418 INFO L628 ElimStorePlain]: treesize reduction 97, result has 10.2 percent of original size [2021-02-19 17:45:52,419 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:52,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_165 vanished before elimination [2021-02-19 17:45:52,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-02-19 17:45:52,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-02-19 17:45:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:52,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:52,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:45:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198441414] [2021-02-19 17:45:52,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:52,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:52,465 INFO L87 Difference]: Start difference. First operand 457 states and 1323 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) [2021-02-19 17:45:52,999 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:45:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:53,162 INFO L93 Difference]: Finished difference Result 575 states and 1569 transitions. [2021-02-19 17:45:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:45:53,163 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 [2021-02-19 17:45:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:53,164 INFO L225 Difference]: With dead ends: 575 [2021-02-19 17:45:53,164 INFO L226 Difference]: Without dead ends: 572 [2021-02-19 17:45:53,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:45:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-02-19 17:45:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 491. [2021-02-19 17:45:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.940816326530612) internal successors, (1441), 490 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1441 transitions. [2021-02-19 17:45:53,169 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1441 transitions. Word has length 16 [2021-02-19 17:45:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:53,169 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 1441 transitions. [2021-02-19 17:45:53,170 INFO L481 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) [2021-02-19 17:45:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1441 transitions. [2021-02-19 17:45:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:53,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:53,170 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:53,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1399,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:53,371 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1713455649, now seen corresponding path program 164 times [2021-02-19 17:45:53,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433129606] [2021-02-19 17:45:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:53,783 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 17:45:53,917 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 17:45:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:54,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433129606] [2021-02-19 17:45:54,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288540581] [2021-02-19 17:45:54,111 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 [2021-02-19 17:45:54,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:54,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:54,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 17:45:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:54,495 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 17:45:54,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,792 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 [2021-02-19 17:45:54,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,804 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 [2021-02-19 17:45:54,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,810 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 [2021-02-19 17:45:54,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,832 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-02-19 17:45:54,832 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:54,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,832 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-02-19 17:45:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:54,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:54,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 17:45:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583411798] [2021-02-19 17:45:54,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:45:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:45:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:54,880 INFO L87 Difference]: Start difference. First operand 491 states and 1441 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) [2021-02-19 17:45:55,240 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 17:45:55,566 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 17:45:55,833 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 17:45:56,144 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 17:45:56,341 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-02-19 17:45:56,566 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 17:45:56,725 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 17:45:56,905 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 17:45:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:56,967 INFO L93 Difference]: Finished difference Result 520 states and 1495 transitions. [2021-02-19 17:45:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:45:56,968 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 [2021-02-19 17:45:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:56,969 INFO L225 Difference]: With dead ends: 520 [2021-02-19 17:45:56,969 INFO L226 Difference]: Without dead ends: 516 [2021-02-19 17:45:56,969 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:45:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-02-19 17:45:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 491. [2021-02-19 17:45:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.938775510204082) internal successors, (1440), 490 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1440 transitions. [2021-02-19 17:45:56,974 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1440 transitions. Word has length 16 [2021-02-19 17:45:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:56,974 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 1440 transitions. [2021-02-19 17:45:56,974 INFO L481 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) [2021-02-19 17:45:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1440 transitions. [2021-02-19 17:45:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:56,975 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:56,975 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:57,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1416 [2021-02-19 17:45:57,175 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -640370269, now seen corresponding path program 165 times [2021-02-19 17:45:57,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:57,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742708122] [2021-02-19 17:45:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:57,574 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-02-19 17:45:57,822 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-02-19 17:45:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742708122] [2021-02-19 17:45:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593265409] [2021-02-19 17:45:58,040 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 [2021-02-19 17:45:58,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:45:58,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:58,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 17:45:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:58,523 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-02-19 17:45:58,719 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-02-19 17:45:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:58,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,827 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 [2021-02-19 17:45:58,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:58,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,844 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 [2021-02-19 17:45:58,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:58,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,860 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 [2021-02-19 17:45:58,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:58,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 17:45:58,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,871 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 39 treesize of output 29 [2021-02-19 17:45:58,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:59,007 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 17:45:59,007 INFO L628 ElimStorePlain]: treesize reduction 101, result has 39.2 percent of original size [2021-02-19 17:45:59,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:59,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:59,016 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:59,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:59,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:59,070 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:253, output treesize:48 [2021-02-19 17:45:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:59,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:59,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 17:45:59,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682335207] [2021-02-19 17:45:59,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:45:59,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:45:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:59,228 INFO L87 Difference]: Start difference. First operand 491 states and 1440 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) [2021-02-19 17:45:59,667 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 17:45:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:59,761 INFO L93 Difference]: Finished difference Result 513 states and 1483 transitions. [2021-02-19 17:45:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:45:59,763 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 [2021-02-19 17:45:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:59,763 INFO L225 Difference]: With dead ends: 513 [2021-02-19 17:45:59,763 INFO L226 Difference]: Without dead ends: 510 [2021-02-19 17:45:59,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:45:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-02-19 17:45:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 491. [2021-02-19 17:45:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.938775510204082) internal successors, (1440), 490 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1440 transitions. [2021-02-19 17:45:59,768 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1440 transitions. Word has length 16 [2021-02-19 17:45:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:59,768 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 1440 transitions. [2021-02-19 17:45:59,768 INFO L481 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) [2021-02-19 17:45:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1440 transitions. [2021-02-19 17:45:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:59,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:59,769 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:59,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:59,970 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:59,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2002561563, now seen corresponding path program 166 times [2021-02-19 17:45:59,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:59,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435161498] [2021-02-19 17:45:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:00,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435161498] [2021-02-19 17:46:00,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568069002] [2021-02-19 17:46:00,120 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 [2021-02-19 17:46:00,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:00,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,334 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 17 treesize of output 13 [2021-02-19 17:46:00,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:00,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:00,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,347 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 [2021-02-19 17:46:00,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:00,352 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,387 INFO L628 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2021-02-19 17:46:00,387 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:00,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:00,388 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-02-19 17:46:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:00,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:00,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:46:00,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828972594] [2021-02-19 17:46:00,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:00,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:00,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:00,440 INFO L87 Difference]: Start difference. First operand 491 states and 1440 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) [2021-02-19 17:46:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:01,216 INFO L93 Difference]: Finished difference Result 650 states and 1851 transitions. [2021-02-19 17:46:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:46:01,217 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 [2021-02-19 17:46:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:01,218 INFO L225 Difference]: With dead ends: 650 [2021-02-19 17:46:01,218 INFO L226 Difference]: Without dead ends: 639 [2021-02-19 17:46:01,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:46:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-02-19 17:46:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 488. [2021-02-19 17:46:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.944558521560575) internal successors, (1434), 487 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1434 transitions. [2021-02-19 17:46:01,223 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1434 transitions. Word has length 17 [2021-02-19 17:46:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:01,223 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 1434 transitions. [2021-02-19 17:46:01,223 INFO L481 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) [2021-02-19 17:46:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1434 transitions. [2021-02-19 17:46:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:01,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:01,224 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:01,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-02-19 17:46:01,424 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash 464142061, now seen corresponding path program 167 times [2021-02-19 17:46:01,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:01,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816947645] [2021-02-19 17:46:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816947645] [2021-02-19 17:46:01,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596094037] [2021-02-19 17:46:01,578 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 [2021-02-19 17:46:01,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:01,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:01,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,775 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 [2021-02-19 17:46:01,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,800 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-02-19 17:46:01,800 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:01,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-02-19 17:46:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:01,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:46:01,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763796895] [2021-02-19 17:46:01,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:01,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:01,833 INFO L87 Difference]: Start difference. First operand 488 states and 1434 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) [2021-02-19 17:46:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:02,185 INFO L93 Difference]: Finished difference Result 651 states and 1859 transitions. [2021-02-19 17:46:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:02,186 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 [2021-02-19 17:46:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:02,187 INFO L225 Difference]: With dead ends: 651 [2021-02-19 17:46:02,187 INFO L226 Difference]: Without dead ends: 651 [2021-02-19 17:46:02,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-02-19 17:46:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 489. [2021-02-19 17:46:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.944672131147541) internal successors, (1437), 488 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1437 transitions. [2021-02-19 17:46:02,192 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1437 transitions. Word has length 17 [2021-02-19 17:46:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:02,193 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 1437 transitions. [2021-02-19 17:46:02,193 INFO L481 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) [2021-02-19 17:46:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1437 transitions. [2021-02-19 17:46:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:02,193 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:02,193 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:02,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1464,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:02,415 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2101260251, now seen corresponding path program 168 times [2021-02-19 17:46:02,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:02,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026931256] [2021-02-19 17:46:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026931256] [2021-02-19 17:46:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047193145] [2021-02-19 17:46:02,611 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 [2021-02-19 17:46:02,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:02,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:02,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:02,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,853 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 [2021-02-19 17:46:02,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:02,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:46:02,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:02,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,935 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:02,935 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:02,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:02,937 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588782012] [2021-02-19 17:46:03,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:03,038 INFO L87 Difference]: Start difference. First operand 489 states and 1437 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) [2021-02-19 17:46:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:03,805 INFO L93 Difference]: Finished difference Result 699 states and 1940 transitions. [2021-02-19 17:46:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:46:03,806 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 [2021-02-19 17:46:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:03,807 INFO L225 Difference]: With dead ends: 699 [2021-02-19 17:46:03,807 INFO L226 Difference]: Without dead ends: 699 [2021-02-19 17:46:03,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-02-19 17:46:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 497. [2021-02-19 17:46:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.9516129032258065) internal successors, (1464), 496 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1464 transitions. [2021-02-19 17:46:03,813 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1464 transitions. Word has length 17 [2021-02-19 17:46:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:03,813 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1464 transitions. [2021-02-19 17:46:03,813 INFO L481 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) [2021-02-19 17:46:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1464 transitions. [2021-02-19 17:46:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:03,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:03,814 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:04,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-02-19 17:46:04,014 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:04,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1392090817, now seen corresponding path program 169 times [2021-02-19 17:46:04,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:04,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562689873] [2021-02-19 17:46:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562689873] [2021-02-19 17:46:04,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455048149] [2021-02-19 17:46:04,207 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 [2021-02-19 17:46:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,453 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 [2021-02-19 17:46:04,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:04,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,465 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 [2021-02-19 17:46:04,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,471 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 17 treesize of output 13 [2021-02-19 17:46:04,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,534 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:04,535 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:04,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:04,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:04,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:04,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081349936] [2021-02-19 17:46:04,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:04,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:04,677 INFO L87 Difference]: Start difference. First operand 497 states and 1464 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) [2021-02-19 17:46:05,281 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 17:46:06,000 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:46:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:06,705 INFO L93 Difference]: Finished difference Result 733 states and 2000 transitions. [2021-02-19 17:46:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 17:46:06,706 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 [2021-02-19 17:46:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:06,707 INFO L225 Difference]: With dead ends: 733 [2021-02-19 17:46:06,707 INFO L226 Difference]: Without dead ends: 724 [2021-02-19 17:46:06,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:46:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-02-19 17:46:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 504. [2021-02-19 17:46:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9542743538767398) internal successors, (1486), 503 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1486 transitions. [2021-02-19 17:46:06,713 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1486 transitions. Word has length 17 [2021-02-19 17:46:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:06,713 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 1486 transitions. [2021-02-19 17:46:06,713 INFO L481 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) [2021-02-19 17:46:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1486 transitions. [2021-02-19 17:46:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:06,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:06,714 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:06,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:06,914 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:06,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash 326252889, now seen corresponding path program 170 times [2021-02-19 17:46:06,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:06,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483952057] [2021-02-19 17:46:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:07,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483952057] [2021-02-19 17:46:07,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064945100] [2021-02-19 17:46:07,076 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 [2021-02-19 17:46:07,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:07,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,326 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 [2021-02-19 17:46:07,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,333 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 15 treesize of output 11 [2021-02-19 17:46:07,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,345 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 16 treesize of output 12 [2021-02-19 17:46:07,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,351 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 [2021-02-19 17:46:07,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,424 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:07,424 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:07,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:07,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:07,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:07,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:07,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655443710] [2021-02-19 17:46:07,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:07,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:07,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:07,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:07,521 INFO L87 Difference]: Start difference. First operand 504 states and 1486 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) [2021-02-19 17:46:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:08,798 INFO L93 Difference]: Finished difference Result 712 states and 1973 transitions. [2021-02-19 17:46:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:46:08,800 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 [2021-02-19 17:46:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:08,800 INFO L225 Difference]: With dead ends: 712 [2021-02-19 17:46:08,800 INFO L226 Difference]: Without dead ends: 712 [2021-02-19 17:46:08,801 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:46:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-02-19 17:46:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 502. [2021-02-19 17:46:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.946107784431138) internal successors, (1476), 501 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1476 transitions. [2021-02-19 17:46:08,806 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1476 transitions. Word has length 17 [2021-02-19 17:46:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:08,806 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1476 transitions. [2021-02-19 17:46:08,806 INFO L481 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) [2021-02-19 17:46:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1476 transitions. [2021-02-19 17:46:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:08,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:08,807 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:09,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-02-19 17:46:09,007 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1384360419, now seen corresponding path program 171 times [2021-02-19 17:46:09,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:09,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375990628] [2021-02-19 17:46:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:09,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375990628] [2021-02-19 17:46:09,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49572767] [2021-02-19 17:46:09,147 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 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 [2021-02-19 17:46:09,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:09,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:46:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:09,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:09,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:09,454 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 19 treesize of output 13 [2021-02-19 17:46:09,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:09,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:46:09,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,501 INFO L628 ElimStorePlain]: treesize reduction 41, result has 34.9 percent of original size [2021-02-19 17:46:09,501 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:09,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,503 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:12 [2021-02-19 17:46:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:09,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:09,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:09,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031704322] [2021-02-19 17:46:09,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:09,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:09,548 INFO L87 Difference]: Start difference. First operand 502 states and 1476 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) [2021-02-19 17:46:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:10,600 INFO L93 Difference]: Finished difference Result 765 states and 2081 transitions. [2021-02-19 17:46:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:46:10,601 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 [2021-02-19 17:46:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:10,602 INFO L225 Difference]: With dead ends: 765 [2021-02-19 17:46:10,602 INFO L226 Difference]: Without dead ends: 765 [2021-02-19 17:46:10,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:46:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-02-19 17:46:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 514. [2021-02-19 17:46:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.957115009746589) internal successors, (1517), 513 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1517 transitions. [2021-02-19 17:46:10,608 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1517 transitions. Word has length 17 [2021-02-19 17:46:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:10,608 INFO L480 AbstractCegarLoop]: Abstraction has 514 states and 1517 transitions. [2021-02-19 17:46:10,608 INFO L481 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) [2021-02-19 17:46:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1517 transitions. [2021-02-19 17:46:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:10,609 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:10,609 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:10,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1479 [2021-02-19 17:46:10,809 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1421201881, now seen corresponding path program 172 times [2021-02-19 17:46:10,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:10,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591294441] [2021-02-19 17:46:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:11,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591294441] [2021-02-19 17:46:11,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808428580] [2021-02-19 17:46:11,007 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 [2021-02-19 17:46:11,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:11,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:11,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:11,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:11,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:11,293 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 [2021-02-19 17:46:11,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:11,298 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 [2021-02-19 17:46:11,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,335 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:46:11,335 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:11,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:46:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:11,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:11,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:11,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883721011] [2021-02-19 17:46:11,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:11,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:11,373 INFO L87 Difference]: Start difference. First operand 514 states and 1517 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) [2021-02-19 17:46:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:12,308 INFO L93 Difference]: Finished difference Result 722 states and 2034 transitions. [2021-02-19 17:46:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:46:12,308 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 [2021-02-19 17:46:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:12,309 INFO L225 Difference]: With dead ends: 722 [2021-02-19 17:46:12,309 INFO L226 Difference]: Without dead ends: 722 [2021-02-19 17:46:12,309 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:46:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-02-19 17:46:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 515. [2021-02-19 17:46:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.955252918287938) internal successors, (1519), 514 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1519 transitions. [2021-02-19 17:46:12,315 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1519 transitions. Word has length 17 [2021-02-19 17:46:12,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:12,315 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1519 transitions. [2021-02-19 17:46:12,315 INFO L481 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) [2021-02-19 17:46:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1519 transitions. [2021-02-19 17:46:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:12,315 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:12,316 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:12,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:12,516 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1800680035, now seen corresponding path program 173 times [2021-02-19 17:46:12,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:12,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449099346] [2021-02-19 17:46:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:12,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449099346] [2021-02-19 17:46:12,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436413904] [2021-02-19 17:46:12,656 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 [2021-02-19 17:46:12,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:12,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:12,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,975 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 [2021-02-19 17:46:12,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,019 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:46:13,019 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:13,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:46:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:13,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:13,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:13,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596807583] [2021-02-19 17:46:13,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:13,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:13,069 INFO L87 Difference]: Start difference. First operand 515 states and 1519 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) [2021-02-19 17:46:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:13,465 INFO L93 Difference]: Finished difference Result 678 states and 1944 transitions. [2021-02-19 17:46:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:13,466 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 [2021-02-19 17:46:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:13,467 INFO L225 Difference]: With dead ends: 678 [2021-02-19 17:46:13,467 INFO L226 Difference]: Without dead ends: 678 [2021-02-19 17:46:13,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-02-19 17:46:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 515. [2021-02-19 17:46:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.955252918287938) internal successors, (1519), 514 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1519 transitions. [2021-02-19 17:46:13,473 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1519 transitions. Word has length 17 [2021-02-19 17:46:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:13,473 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1519 transitions. [2021-02-19 17:46:13,473 INFO L481 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) [2021-02-19 17:46:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1519 transitions. [2021-02-19 17:46:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:13,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:13,474 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:13,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-02-19 17:46:13,674 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:13,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1235007839, now seen corresponding path program 174 times [2021-02-19 17:46:13,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:13,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693117190] [2021-02-19 17:46:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693117190] [2021-02-19 17:46:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207011573] [2021-02-19 17:46:13,851 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 [2021-02-19 17:46:13,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:46:13,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:14,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,072 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 15 treesize of output 11 [2021-02-19 17:46:14,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,077 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 [2021-02-19 17:46:14,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,113 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:46:14,114 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:14,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:46:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:14,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:14,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:14,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137446540] [2021-02-19 17:46:14,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:14,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:14,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:14,162 INFO L87 Difference]: Start difference. First operand 515 states and 1519 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) [2021-02-19 17:46:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:14,865 INFO L93 Difference]: Finished difference Result 720 states and 1961 transitions. [2021-02-19 17:46:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:46:14,866 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 [2021-02-19 17:46:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:14,867 INFO L225 Difference]: With dead ends: 720 [2021-02-19 17:46:14,867 INFO L226 Difference]: Without dead ends: 720 [2021-02-19 17:46:14,867 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:46:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-02-19 17:46:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 539. [2021-02-19 17:46:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.979553903345725) internal successors, (1603), 538 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1603 transitions. [2021-02-19 17:46:14,873 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1603 transitions. Word has length 17 [2021-02-19 17:46:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:14,873 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 1603 transitions. [2021-02-19 17:46:14,873 INFO L481 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) [2021-02-19 17:46:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1603 transitions. [2021-02-19 17:46:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:14,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:14,873 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:15,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1488 [2021-02-19 17:46:15,074 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash 315307131, now seen corresponding path program 175 times [2021-02-19 17:46:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:15,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519960291] [2021-02-19 17:46:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519960291] [2021-02-19 17:46:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848110704] [2021-02-19 17:46:15,242 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 [2021-02-19 17:46:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:15,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:15,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,483 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 16 treesize of output 12 [2021-02-19 17:46:15,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:15,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,500 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 17 treesize of output 13 [2021-02-19 17:46:15,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:15,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:15,513 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,570 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:46:15,570 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:15,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:15,571 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:46:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:15,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:15,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204670370] [2021-02-19 17:46:15,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:15,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:15,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:15,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:15,640 INFO L87 Difference]: Start difference. First operand 539 states and 1603 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) [2021-02-19 17:46:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:16,523 INFO L93 Difference]: Finished difference Result 636 states and 1768 transitions. [2021-02-19 17:46:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:46:16,524 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 [2021-02-19 17:46:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:16,525 INFO L225 Difference]: With dead ends: 636 [2021-02-19 17:46:16,525 INFO L226 Difference]: Without dead ends: 632 [2021-02-19 17:46:16,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:46:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-02-19 17:46:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 540. [2021-02-19 17:46:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.968460111317254) internal successors, (1600), 539 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) [2021-02-19 17:46:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1600 transitions. [2021-02-19 17:46:16,530 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1600 transitions. Word has length 17 [2021-02-19 17:46:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:16,530 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1600 transitions. [2021-02-19 17:46:16,530 INFO L481 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) [2021-02-19 17:46:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1600 transitions. [2021-02-19 17:46:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:16,531 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:16,531 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:16,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:16,734 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:16,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1242738237, now seen corresponding path program 176 times [2021-02-19 17:46:16,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:16,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293955207] [2021-02-19 17:46:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:16,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293955207] [2021-02-19 17:46:16,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224670895] [2021-02-19 17:46:16,930 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 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 [2021-02-19 17:46:16,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:17,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:46:17,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,128 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 15 treesize of output 11 [2021-02-19 17:46:17,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,135 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 [2021-02-19 17:46:17,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,141 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 [2021-02-19 17:46:17,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,208 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:17,209 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:17,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:17,210 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929266800] [2021-02-19 17:46:17,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:17,314 INFO L87 Difference]: Start difference. First operand 540 states and 1600 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) [2021-02-19 17:46:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:18,505 INFO L93 Difference]: Finished difference Result 713 states and 1901 transitions. [2021-02-19 17:46:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:46:18,506 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 [2021-02-19 17:46:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:18,507 INFO L225 Difference]: With dead ends: 713 [2021-02-19 17:46:18,507 INFO L226 Difference]: Without dead ends: 711 [2021-02-19 17:46:18,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:46:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-02-19 17:46:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 542. [2021-02-19 17:46:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.9704251386321627) internal successors, (1607), 541 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1607 transitions. [2021-02-19 17:46:18,513 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1607 transitions. Word has length 17 [2021-02-19 17:46:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:18,513 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1607 transitions. [2021-02-19 17:46:18,513 INFO L481 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) [2021-02-19 17:46:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1607 transitions. [2021-02-19 17:46:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:18,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:18,513 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:18,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-02-19 17:46:18,714 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:18,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:18,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354465, now seen corresponding path program 177 times [2021-02-19 17:46:18,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:18,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58083799] [2021-02-19 17:46:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:18,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58083799] [2021-02-19 17:46:18,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650015826] [2021-02-19 17:46:18,870 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 [2021-02-19 17:46:18,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:46:18,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:19,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,057 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 [2021-02-19 17:46:19,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:19,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,071 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 16 treesize of output 12 [2021-02-19 17:46:19,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,077 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 [2021-02-19 17:46:19,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,148 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:19,148 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:19,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:19,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:19,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:19,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134603804] [2021-02-19 17:46:19,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:19,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:19,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:19,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:19,303 INFO L87 Difference]: Start difference. First operand 542 states and 1607 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) [2021-02-19 17:46:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:20,823 INFO L93 Difference]: Finished difference Result 725 states and 1935 transitions. [2021-02-19 17:46:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:46:20,824 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 [2021-02-19 17:46:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:20,825 INFO L225 Difference]: With dead ends: 725 [2021-02-19 17:46:20,825 INFO L226 Difference]: Without dead ends: 721 [2021-02-19 17:46:20,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:46:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-02-19 17:46:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 551. [2021-02-19 17:46:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.949090909090909) internal successors, (1622), 550 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1622 transitions. [2021-02-19 17:46:20,832 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1622 transitions. Word has length 17 [2021-02-19 17:46:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:20,832 INFO L480 AbstractCegarLoop]: Abstraction has 551 states and 1622 transitions. [2021-02-19 17:46:20,832 INFO L481 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) [2021-02-19 17:46:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1622 transitions. [2021-02-19 17:46:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:20,832 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:20,832 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:21,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1499,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:21,034 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -532269125, now seen corresponding path program 178 times [2021-02-19 17:46:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:21,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380043024] [2021-02-19 17:46:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:21,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380043024] [2021-02-19 17:46:21,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498586762] [2021-02-19 17:46:21,296 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) [2021-02-19 17:46:21,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:21,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:21,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:21,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:21,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,555 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 [2021-02-19 17:46:21,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,561 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 [2021-02-19 17:46:21,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,568 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 [2021-02-19 17:46:21,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,574 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 17 treesize of output 13 [2021-02-19 17:46:21,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,642 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:21,643 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:21,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:21,644 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:21,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:21,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:21,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465640332] [2021-02-19 17:46:21,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:21,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:21,747 INFO L87 Difference]: Start difference. First operand 551 states and 1622 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) [2021-02-19 17:46:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:22,940 INFO L93 Difference]: Finished difference Result 725 states and 1915 transitions. [2021-02-19 17:46:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:46:22,941 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 [2021-02-19 17:46:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:22,942 INFO L225 Difference]: With dead ends: 725 [2021-02-19 17:46:22,942 INFO L226 Difference]: Without dead ends: 725 [2021-02-19 17:46:22,942 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:46:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-02-19 17:46:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 520. [2021-02-19 17:46:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.8921001926782273) internal successors, (1501), 519 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1501 transitions. [2021-02-19 17:46:22,948 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1501 transitions. Word has length 17 [2021-02-19 17:46:22,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:22,948 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 1501 transitions. [2021-02-19 17:46:22,948 INFO L481 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) [2021-02-19 17:46:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1501 transitions. [2021-02-19 17:46:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:22,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:22,949 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:23,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1504 [2021-02-19 17:46:23,154 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1360854427, now seen corresponding path program 179 times [2021-02-19 17:46:23,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:23,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373059073] [2021-02-19 17:46:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:23,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373059073] [2021-02-19 17:46:23,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379731169] [2021-02-19 17:46:23,326 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 [2021-02-19 17:46:23,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:23,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:23,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:23,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,518 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 16 treesize of output 12 [2021-02-19 17:46:23,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:23,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,532 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 16 treesize of output 12 [2021-02-19 17:46:23,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,538 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 17 treesize of output 13 [2021-02-19 17:46:23,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,607 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:23,607 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:23,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:23,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:23,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:23,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:23,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765334943] [2021-02-19 17:46:23,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:23,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:23,744 INFO L87 Difference]: Start difference. First operand 520 states and 1501 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) [2021-02-19 17:46:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:25,770 INFO L93 Difference]: Finished difference Result 711 states and 1875 transitions. [2021-02-19 17:46:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 17:46:25,772 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 [2021-02-19 17:46:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:25,773 INFO L225 Difference]: With dead ends: 711 [2021-02-19 17:46:25,773 INFO L226 Difference]: Without dead ends: 706 [2021-02-19 17:46:25,773 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:46:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-02-19 17:46:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 548. [2021-02-19 17:46:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.917733089579525) internal successors, (1596), 547 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1596 transitions. [2021-02-19 17:46:25,780 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1596 transitions. Word has length 17 [2021-02-19 17:46:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:25,780 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1596 transitions. [2021-02-19 17:46:25,780 INFO L481 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) [2021-02-19 17:46:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1596 transitions. [2021-02-19 17:46:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:25,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:25,781 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:25,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:25,982 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1205065535, now seen corresponding path program 180 times [2021-02-19 17:46:25,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:25,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678558453] [2021-02-19 17:46:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:26,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678558453] [2021-02-19 17:46:26,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254208581] [2021-02-19 17:46:26,134 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 [2021-02-19 17:46:26,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:26,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:26,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,431 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 [2021-02-19 17:46:26,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:26,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,443 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 7 treesize of output 5 [2021-02-19 17:46:26,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,450 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 [2021-02-19 17:46:26,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,458 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 [2021-02-19 17:46:26,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:26,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,532 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:46:26,532 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:26,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:26,534 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:46:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:26,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:26,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:26,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786125748] [2021-02-19 17:46:26,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:26,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:26,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:26,584 INFO L87 Difference]: Start difference. First operand 548 states and 1596 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) [2021-02-19 17:46:27,249 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:46:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:27,868 INFO L93 Difference]: Finished difference Result 646 states and 1763 transitions. [2021-02-19 17:46:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:46:27,869 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 [2021-02-19 17:46:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:27,870 INFO L225 Difference]: With dead ends: 646 [2021-02-19 17:46:27,870 INFO L226 Difference]: Without dead ends: 638 [2021-02-19 17:46:27,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:46:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-02-19 17:46:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 552. [2021-02-19 17:46:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.8947368421052633) internal successors, (1595), 551 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1595 transitions. [2021-02-19 17:46:27,878 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1595 transitions. Word has length 17 [2021-02-19 17:46:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:27,878 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 1595 transitions. [2021-02-19 17:46:27,878 INFO L481 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) [2021-02-19 17:46:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1595 transitions. [2021-02-19 17:46:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:27,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:27,879 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:28,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1514 [2021-02-19 17:46:28,094 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 562679867, now seen corresponding path program 181 times [2021-02-19 17:46:28,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:28,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297627407] [2021-02-19 17:46:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297627407] [2021-02-19 17:46:28,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803831938] [2021-02-19 17:46:28,247 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 [2021-02-19 17:46:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:28,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:28,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,448 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 [2021-02-19 17:46:28,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,455 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 [2021-02-19 17:46:28,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,500 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:46:28,500 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:28,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:46:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:28,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:28,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724405567] [2021-02-19 17:46:28,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:28,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:28,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:28,547 INFO L87 Difference]: Start difference. First operand 552 states and 1595 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) [2021-02-19 17:46:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:29,591 INFO L93 Difference]: Finished difference Result 742 states and 1942 transitions. [2021-02-19 17:46:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:46:29,593 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 [2021-02-19 17:46:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:29,594 INFO L225 Difference]: With dead ends: 742 [2021-02-19 17:46:29,594 INFO L226 Difference]: Without dead ends: 742 [2021-02-19 17:46:29,594 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:46:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-02-19 17:46:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 553. [2021-02-19 17:46:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.88768115942029) internal successors, (1594), 552 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1594 transitions. [2021-02-19 17:46:29,599 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1594 transitions. Word has length 17 [2021-02-19 17:46:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:29,600 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 1594 transitions. [2021-02-19 17:46:29,600 INFO L481 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) [2021-02-19 17:46:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1594 transitions. [2021-02-19 17:46:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:29,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:29,600 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:29,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1521,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:29,801 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1861027489, now seen corresponding path program 182 times [2021-02-19 17:46:29,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:29,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470743664] [2021-02-19 17:46:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470743664] [2021-02-19 17:46:29,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448932471] [2021-02-19 17:46:29,978 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 [2021-02-19 17:46:29,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:30,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,161 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 16 treesize of output 12 [2021-02-19 17:46:30,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,168 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 15 treesize of output 11 [2021-02-19 17:46:30,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,176 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 16 treesize of output 12 [2021-02-19 17:46:30,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,183 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 17 treesize of output 13 [2021-02-19 17:46:30,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,259 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:30,259 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:30,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:30,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:30,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:30,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:30,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975813239] [2021-02-19 17:46:30,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:30,421 INFO L87 Difference]: Start difference. First operand 553 states and 1594 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) [2021-02-19 17:46:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:31,921 INFO L93 Difference]: Finished difference Result 687 states and 1855 transitions. [2021-02-19 17:46:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:46:31,922 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 [2021-02-19 17:46:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:31,923 INFO L225 Difference]: With dead ends: 687 [2021-02-19 17:46:31,923 INFO L226 Difference]: Without dead ends: 683 [2021-02-19 17:46:31,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:46:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-19 17:46:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 570. [2021-02-19 17:46:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.889279437609842) internal successors, (1644), 569 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1644 transitions. [2021-02-19 17:46:31,928 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1644 transitions. Word has length 17 [2021-02-19 17:46:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:31,928 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1644 transitions. [2021-02-19 17:46:31,928 INFO L481 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) [2021-02-19 17:46:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1644 transitions. [2021-02-19 17:46:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:31,929 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:31,929 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:32,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1524,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:32,129 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:32,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash -131980155, now seen corresponding path program 183 times [2021-02-19 17:46:32,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:32,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939226242] [2021-02-19 17:46:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939226242] [2021-02-19 17:46:32,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045013529] [2021-02-19 17:46:32,303 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 [2021-02-19 17:46:32,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:32,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:32,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:46:32,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:32,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:32,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:32,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,655 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 17 treesize of output 13 [2021-02-19 17:46:32,657 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,661 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 [2021-02-19 17:46:32,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,731 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:46:32,731 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:32,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:32,733 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:46:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:32,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:32,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116721137] [2021-02-19 17:46:32,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:32,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:32,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:32,799 INFO L87 Difference]: Start difference. First operand 570 states and 1644 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) [2021-02-19 17:46:33,331 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:46:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:33,591 INFO L93 Difference]: Finished difference Result 621 states and 1739 transitions. [2021-02-19 17:46:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:46:33,593 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 [2021-02-19 17:46:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:33,594 INFO L225 Difference]: With dead ends: 621 [2021-02-19 17:46:33,594 INFO L226 Difference]: Without dead ends: 613 [2021-02-19 17:46:33,594 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:46:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-02-19 17:46:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 570. [2021-02-19 17:46:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.882249560632689) internal successors, (1640), 569 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) [2021-02-19 17:46:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1640 transitions. [2021-02-19 17:46:33,599 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1640 transitions. Word has length 17 [2021-02-19 17:46:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:33,599 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1640 transitions. [2021-02-19 17:46:33,599 INFO L481 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) [2021-02-19 17:46:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1640 transitions. [2021-02-19 17:46:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:33,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:33,600 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:33,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1530 [2021-02-19 17:46:33,800 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1928879647, now seen corresponding path program 184 times [2021-02-19 17:46:33,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:33,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762957186] [2021-02-19 17:46:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762957186] [2021-02-19 17:46:33,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292317636] [2021-02-19 17:46:33,951 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 [2021-02-19 17:46:33,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:33,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:34,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,251 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 [2021-02-19 17:46:34,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:34,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,262 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 [2021-02-19 17:46:34,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,268 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 8 treesize of output 6 [2021-02-19 17:46:34,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,276 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 [2021-02-19 17:46:34,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:34,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,353 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:46:34,353 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:34,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:34,355 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:46:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:34,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:34,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:34,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541789282] [2021-02-19 17:46:34,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:34,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:34,421 INFO L87 Difference]: Start difference. First operand 570 states and 1640 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) [2021-02-19 17:46:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:35,194 INFO L93 Difference]: Finished difference Result 617 states and 1729 transitions. [2021-02-19 17:46:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:46:35,195 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 [2021-02-19 17:46:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:35,196 INFO L225 Difference]: With dead ends: 617 [2021-02-19 17:46:35,196 INFO L226 Difference]: Without dead ends: 605 [2021-02-19 17:46:35,196 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:46:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-02-19 17:46:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 572. [2021-02-19 17:46:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.870402802101576) internal successors, (1639), 571 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) [2021-02-19 17:46:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1639 transitions. [2021-02-19 17:46:35,202 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1639 transitions. Word has length 17 [2021-02-19 17:46:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:35,202 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1639 transitions. [2021-02-19 17:46:35,202 INFO L481 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) [2021-02-19 17:46:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1639 transitions. [2021-02-19 17:46:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:35,203 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:35,203 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:35,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1537,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:35,403 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash 146360251, now seen corresponding path program 185 times [2021-02-19 17:46:35,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:35,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892953655] [2021-02-19 17:46:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:35,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892953655] [2021-02-19 17:46:35,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801981076] [2021-02-19 17:46:35,578 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 [2021-02-19 17:46:35,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:35,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:46:35,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:35,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,840 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:46:35,840 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:35,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:46:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:35,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:35,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891465733] [2021-02-19 17:46:35,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:35,894 INFO L87 Difference]: Start difference. First operand 572 states and 1639 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) [2021-02-19 17:46:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:36,498 INFO L93 Difference]: Finished difference Result 655 states and 1813 transitions. [2021-02-19 17:46:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:46:36,499 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 [2021-02-19 17:46:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:36,500 INFO L225 Difference]: With dead ends: 655 [2021-02-19 17:46:36,500 INFO L226 Difference]: Without dead ends: 655 [2021-02-19 17:46:36,500 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-02-19 17:46:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 572. [2021-02-19 17:46:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.870402802101576) internal successors, (1639), 571 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) [2021-02-19 17:46:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1639 transitions. [2021-02-19 17:46:36,506 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1639 transitions. Word has length 17 [2021-02-19 17:46:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:36,506 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1639 transitions. [2021-02-19 17:46:36,506 INFO L481 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) [2021-02-19 17:46:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1639 transitions. [2021-02-19 17:46:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:36,506 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:36,506 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:36,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1544 [2021-02-19 17:46:36,707 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash -267672967, now seen corresponding path program 186 times [2021-02-19 17:46:36,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:36,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581136090] [2021-02-19 17:46:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581136090] [2021-02-19 17:46:36,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933823923] [2021-02-19 17:46:36,918 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 [2021-02-19 17:46:36,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:36,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:36,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:37,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,177 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 [2021-02-19 17:46:37,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:37,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,193 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 [2021-02-19 17:46:37,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,200 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 17 treesize of output 13 [2021-02-19 17:46:37,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,278 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:37,278 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:37,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:37,279 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:37,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:37,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:37,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941986089] [2021-02-19 17:46:37,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:37,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:37,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:37,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:37,403 INFO L87 Difference]: Start difference. First operand 572 states and 1639 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) [2021-02-19 17:46:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:37,964 INFO L93 Difference]: Finished difference Result 669 states and 1823 transitions. [2021-02-19 17:46:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:46:37,966 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 [2021-02-19 17:46:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:37,967 INFO L225 Difference]: With dead ends: 669 [2021-02-19 17:46:37,967 INFO L226 Difference]: Without dead ends: 669 [2021-02-19 17:46:37,967 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-02-19 17:46:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 583. [2021-02-19 17:46:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.879725085910653) internal successors, (1676), 582 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) [2021-02-19 17:46:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1676 transitions. [2021-02-19 17:46:37,973 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1676 transitions. Word has length 17 [2021-02-19 17:46:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:37,973 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1676 transitions. [2021-02-19 17:46:37,973 INFO L481 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) [2021-02-19 17:46:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1676 transitions. [2021-02-19 17:46:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:37,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:37,973 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:38,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:38,174 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:38,174 INFO L82 PathProgramCache]: Analyzing trace with hash 533943261, now seen corresponding path program 187 times [2021-02-19 17:46:38,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:38,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559159853] [2021-02-19 17:46:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:38,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559159853] [2021-02-19 17:46:38,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890405076] [2021-02-19 17:46:38,356 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 [2021-02-19 17:46:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:38,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,587 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 [2021-02-19 17:46:38,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,593 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 15 treesize of output 11 [2021-02-19 17:46:38,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,598 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 16 treesize of output 12 [2021-02-19 17:46:38,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,603 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 17 treesize of output 13 [2021-02-19 17:46:38,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,660 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:38,660 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:38,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:38,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:38,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:38,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:38,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572997119] [2021-02-19 17:46:38,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:38,797 INFO L87 Difference]: Start difference. First operand 583 states and 1676 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) [2021-02-19 17:46:39,329 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:46:39,902 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:46:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:40,664 INFO L93 Difference]: Finished difference Result 706 states and 1892 transitions. [2021-02-19 17:46:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:46:40,666 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 [2021-02-19 17:46:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:40,667 INFO L225 Difference]: With dead ends: 706 [2021-02-19 17:46:40,667 INFO L226 Difference]: Without dead ends: 697 [2021-02-19 17:46:40,667 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:46:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-02-19 17:46:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 590. [2021-02-19 17:46:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.8828522920203734) internal successors, (1698), 589 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1698 transitions. [2021-02-19 17:46:40,673 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1698 transitions. Word has length 17 [2021-02-19 17:46:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:40,673 INFO L480 AbstractCegarLoop]: Abstraction has 590 states and 1698 transitions. [2021-02-19 17:46:40,673 INFO L481 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) [2021-02-19 17:46:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1698 transitions. [2021-02-19 17:46:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:40,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:40,674 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:40,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-02-19 17:46:40,874 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:40,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2042680329, now seen corresponding path program 188 times [2021-02-19 17:46:40,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:40,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437277412] [2021-02-19 17:46:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437277412] [2021-02-19 17:46:41,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050430765] [2021-02-19 17:46:41,064 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 [2021-02-19 17:46:41,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:41,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,269 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 [2021-02-19 17:46:41,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:41,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,280 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 16 treesize of output 12 [2021-02-19 17:46:41,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,285 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 17 treesize of output 13 [2021-02-19 17:46:41,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,353 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:41,353 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:41,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:41,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:41,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:41,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999938491] [2021-02-19 17:46:41,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:41,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:41,472 INFO L87 Difference]: Start difference. First operand 590 states and 1698 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) [2021-02-19 17:46:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:42,675 INFO L93 Difference]: Finished difference Result 685 states and 1865 transitions. [2021-02-19 17:46:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:46:42,676 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 [2021-02-19 17:46:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:42,677 INFO L225 Difference]: With dead ends: 685 [2021-02-19 17:46:42,677 INFO L226 Difference]: Without dead ends: 685 [2021-02-19 17:46:42,677 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:46:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-02-19 17:46:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 581. [2021-02-19 17:46:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 2.8706896551724137) internal successors, (1665), 580 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1665 transitions. [2021-02-19 17:46:42,683 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1665 transitions. Word has length 17 [2021-02-19 17:46:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:42,683 INFO L480 AbstractCegarLoop]: Abstraction has 581 states and 1665 transitions. [2021-02-19 17:46:42,683 INFO L481 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) [2021-02-19 17:46:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1665 transitions. [2021-02-19 17:46:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:42,684 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:42,684 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:42,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-02-19 17:46:42,884 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash 541673659, now seen corresponding path program 189 times [2021-02-19 17:46:42,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:42,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229367259] [2021-02-19 17:46:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:43,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229367259] [2021-02-19 17:46:43,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294973622] [2021-02-19 17:46:43,061 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 [2021-02-19 17:46:43,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:46:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:43,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,332 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 19 treesize of output 13 [2021-02-19 17:46:43,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,337 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 20 treesize of output 14 [2021-02-19 17:46:43,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,375 INFO L628 ElimStorePlain]: treesize reduction 41, result has 34.9 percent of original size [2021-02-19 17:46:43,375 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:43,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:12 [2021-02-19 17:46:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:43,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:43,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343637575] [2021-02-19 17:46:43,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:43,414 INFO L87 Difference]: Start difference. First operand 581 states and 1665 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) [2021-02-19 17:46:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:44,688 INFO L93 Difference]: Finished difference Result 717 states and 1922 transitions. [2021-02-19 17:46:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:46:44,689 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 [2021-02-19 17:46:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:44,690 INFO L225 Difference]: With dead ends: 717 [2021-02-19 17:46:44,690 INFO L226 Difference]: Without dead ends: 717 [2021-02-19 17:46:44,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:46:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-02-19 17:46:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 579. [2021-02-19 17:46:44,695 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) [2021-02-19 17:46:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1658 transitions. [2021-02-19 17:46:44,696 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1658 transitions. Word has length 17 [2021-02-19 17:46:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:44,696 INFO L480 AbstractCegarLoop]: Abstraction has 579 states and 1658 transitions. [2021-02-19 17:46:44,696 INFO L481 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) [2021-02-19 17:46:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1658 transitions. [2021-02-19 17:46:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:44,696 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:44,696 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:44,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:44,897 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash -947731337, now seen corresponding path program 190 times [2021-02-19 17:46:44,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:44,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463452792] [2021-02-19 17:46:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463452792] [2021-02-19 17:46:45,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020438399] [2021-02-19 17:46:45,030 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 [2021-02-19 17:46:45,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:45,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:45,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:45,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,318 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 [2021-02-19 17:46:45,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,325 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 15 treesize of output 11 [2021-02-19 17:46:45,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,372 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:46:45,372 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:45,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:46:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:45,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:45,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200866942] [2021-02-19 17:46:45,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:45,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:45,423 INFO L87 Difference]: Start difference. First operand 579 states and 1658 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) [2021-02-19 17:46:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:46,387 INFO L93 Difference]: Finished difference Result 666 states and 1847 transitions. [2021-02-19 17:46:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:46:46,387 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 [2021-02-19 17:46:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:46,388 INFO L225 Difference]: With dead ends: 666 [2021-02-19 17:46:46,388 INFO L226 Difference]: Without dead ends: 666 [2021-02-19 17:46:46,388 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:46:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-02-19 17:46:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 579. [2021-02-19 17:46:46,397 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) [2021-02-19 17:46:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1658 transitions. [2021-02-19 17:46:46,398 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1658 transitions. Word has length 17 [2021-02-19 17:46:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:46,398 INFO L480 AbstractCegarLoop]: Abstraction has 579 states and 1658 transitions. [2021-02-19 17:46:46,398 INFO L481 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) [2021-02-19 17:46:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1658 transitions. [2021-02-19 17:46:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:46,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:46,399 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:46,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-02-19 17:46:46,599 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:46,600 INFO L82 PathProgramCache]: Analyzing trace with hash 125354043, now seen corresponding path program 191 times [2021-02-19 17:46:46,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:46,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259518055] [2021-02-19 17:46:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:46,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259518055] [2021-02-19 17:46:46,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210837970] [2021-02-19 17:46:46,784 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 [2021-02-19 17:46:46,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:47,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,099 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 [2021-02-19 17:46:47,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,106 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 [2021-02-19 17:46:47,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,158 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:46:47,158 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:47,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:46:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:47,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:47,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:47,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857485326] [2021-02-19 17:46:47,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:47,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:47,216 INFO L87 Difference]: Start difference. First operand 579 states and 1658 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) [2021-02-19 17:46:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:47,689 INFO L93 Difference]: Finished difference Result 633 states and 1775 transitions. [2021-02-19 17:46:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:46:47,691 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 [2021-02-19 17:46:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:47,692 INFO L225 Difference]: With dead ends: 633 [2021-02-19 17:46:47,692 INFO L226 Difference]: Without dead ends: 633 [2021-02-19 17:46:47,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-02-19 17:46:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 580. [2021-02-19 17:46:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.8687392055267704) internal successors, (1661), 579 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) [2021-02-19 17:46:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1661 transitions. [2021-02-19 17:46:47,697 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1661 transitions. Word has length 17 [2021-02-19 17:46:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:47,697 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1661 transitions. [2021-02-19 17:46:47,697 INFO L481 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) [2021-02-19 17:46:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1661 transitions. [2021-02-19 17:46:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:47,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:47,698 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:47,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1566 [2021-02-19 17:46:47,898 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash 150986843, now seen corresponding path program 192 times [2021-02-19 17:46:47,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:47,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730697702] [2021-02-19 17:46:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730697702] [2021-02-19 17:46:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135904662] [2021-02-19 17:46:48,051 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 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 [2021-02-19 17:46:48,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:48,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,300 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 15 treesize of output 11 [2021-02-19 17:46:48,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,307 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 [2021-02-19 17:46:48,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,343 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:46:48,343 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:48,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:46:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:48,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:48,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758996345] [2021-02-19 17:46:48,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:48,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:48,400 INFO L87 Difference]: Start difference. First operand 580 states and 1661 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) [2021-02-19 17:46:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:49,237 INFO L93 Difference]: Finished difference Result 763 states and 2049 transitions. [2021-02-19 17:46:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:46:49,238 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 [2021-02-19 17:46:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:49,239 INFO L225 Difference]: With dead ends: 763 [2021-02-19 17:46:49,239 INFO L226 Difference]: Without dead ends: 763 [2021-02-19 17:46:49,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-02-19 17:46:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 635. [2021-02-19 17:46:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 2.8958990536277605) internal successors, (1836), 634 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1836 transitions. [2021-02-19 17:46:49,248 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1836 transitions. Word has length 17 [2021-02-19 17:46:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:49,248 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 1836 transitions. [2021-02-19 17:46:49,248 INFO L481 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) [2021-02-19 17:46:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1836 transitions. [2021-02-19 17:46:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:49,249 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:49,249 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:49,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1569 [2021-02-19 17:46:49,470 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1705035967, now seen corresponding path program 193 times [2021-02-19 17:46:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:49,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107266767] [2021-02-19 17:46:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107266767] [2021-02-19 17:46:49,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662962140] [2021-02-19 17:46:49,636 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 [2021-02-19 17:46:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:49,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:49,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,890 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 16 treesize of output 12 [2021-02-19 17:46:49,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,894 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 [2021-02-19 17:46:49,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,901 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 [2021-02-19 17:46:49,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:49,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:49,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,963 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:46:49,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:49,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:49,964 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:46:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:50,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:50,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291994161] [2021-02-19 17:46:50,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:50,043 INFO L87 Difference]: Start difference. First operand 635 states and 1836 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) [2021-02-19 17:46:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:51,123 INFO L93 Difference]: Finished difference Result 720 states and 1958 transitions. [2021-02-19 17:46:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:46:51,124 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 [2021-02-19 17:46:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:51,125 INFO L225 Difference]: With dead ends: 720 [2021-02-19 17:46:51,125 INFO L226 Difference]: Without dead ends: 714 [2021-02-19 17:46:51,125 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:46:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-02-19 17:46:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 635. [2021-02-19 17:46:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 2.8848580441640377) internal successors, (1829), 634 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1829 transitions. [2021-02-19 17:46:51,131 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1829 transitions. Word has length 17 [2021-02-19 17:46:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:51,131 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 1829 transitions. [2021-02-19 17:46:51,131 INFO L481 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) [2021-02-19 17:46:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1829 transitions. [2021-02-19 17:46:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:51,132 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:51,132 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:51,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:51,332 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash 390629181, now seen corresponding path program 194 times [2021-02-19 17:46:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:51,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026526552] [2021-02-19 17:46:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026526552] [2021-02-19 17:46:51,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447152353] [2021-02-19 17:46:51,532 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 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 [2021-02-19 17:46:51,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:51,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,768 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 [2021-02-19 17:46:51,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,773 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 [2021-02-19 17:46:51,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,812 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:46:51,813 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:51,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:46:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:51,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:51,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841798190] [2021-02-19 17:46:51,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:51,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:51,872 INFO L87 Difference]: Start difference. First operand 635 states and 1829 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) [2021-02-19 17:46:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:53,554 INFO L93 Difference]: Finished difference Result 774 states and 2069 transitions. [2021-02-19 17:46:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:46:53,555 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 [2021-02-19 17:46:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:53,555 INFO L225 Difference]: With dead ends: 774 [2021-02-19 17:46:53,555 INFO L226 Difference]: Without dead ends: 774 [2021-02-19 17:46:53,556 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:46:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-02-19 17:46:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 626. [2021-02-19 17:46:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.888) internal successors, (1805), 625 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1805 transitions. [2021-02-19 17:46:53,562 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1805 transitions. Word has length 17 [2021-02-19 17:46:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:53,562 INFO L480 AbstractCegarLoop]: Abstraction has 626 states and 1805 transitions. [2021-02-19 17:46:53,562 INFO L481 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) [2021-02-19 17:46:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1805 transitions. [2021-02-19 17:46:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:53,563 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:53,563 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:53,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1576,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:53,763 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash -529071527, now seen corresponding path program 195 times [2021-02-19 17:46:53,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:53,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224115603] [2021-02-19 17:46:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:53,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224115603] [2021-02-19 17:46:53,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197855632] [2021-02-19 17:46:53,978 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 [2021-02-19 17:46:54,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:54,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:54,303 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 [2021-02-19 17:46:54,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,314 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 [2021-02-19 17:46:54,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:46:54,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,330 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 [2021-02-19 17:46:54,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:54,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:54,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,392 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:46:54,392 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:54,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:46:54,393 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:46:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:54,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:54,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890358563] [2021-02-19 17:46:54,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:54,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:54,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:54,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:54,452 INFO L87 Difference]: Start difference. First operand 626 states and 1805 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) [2021-02-19 17:46:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:55,468 INFO L93 Difference]: Finished difference Result 700 states and 1916 transitions. [2021-02-19 17:46:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:46:55,469 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 [2021-02-19 17:46:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:55,470 INFO L225 Difference]: With dead ends: 700 [2021-02-19 17:46:55,470 INFO L226 Difference]: Without dead ends: 696 [2021-02-19 17:46:55,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:46:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-02-19 17:46:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 626. [2021-02-19 17:46:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.8848) internal successors, (1803), 625 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1803 transitions. [2021-02-19 17:46:55,476 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1803 transitions. Word has length 17 [2021-02-19 17:46:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:55,477 INFO L480 AbstractCegarLoop]: Abstraction has 626 states and 1803 transitions. [2021-02-19 17:46:55,478 INFO L481 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) [2021-02-19 17:46:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1803 transitions. [2021-02-19 17:46:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:55,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:55,479 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:55,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1578 [2021-02-19 17:46:55,699 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash 398359579, now seen corresponding path program 196 times [2021-02-19 17:46:55,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:55,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895395956] [2021-02-19 17:46:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:55,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895395956] [2021-02-19 17:46:55,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780520488] [2021-02-19 17:46:55,925 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 [2021-02-19 17:46:55,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:55,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:55,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:55,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:56,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,176 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 16 treesize of output 12 [2021-02-19 17:46:56,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,182 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 15 treesize of output 11 [2021-02-19 17:46:56,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,187 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 [2021-02-19 17:46:56,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,192 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 17 treesize of output 13 [2021-02-19 17:46:56,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,250 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:56,250 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:56,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:56,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:56,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:56,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110525936] [2021-02-19 17:46:56,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:56,341 INFO L87 Difference]: Start difference. First operand 626 states and 1803 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) [2021-02-19 17:46:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:57,718 INFO L93 Difference]: Finished difference Result 781 states and 2053 transitions. [2021-02-19 17:46:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:46:57,719 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 [2021-02-19 17:46:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:57,720 INFO L225 Difference]: With dead ends: 781 [2021-02-19 17:46:57,720 INFO L226 Difference]: Without dead ends: 781 [2021-02-19 17:46:57,720 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:46:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-02-19 17:46:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 626. [2021-02-19 17:46:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.8848) internal successors, (1803), 625 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1803 transitions. [2021-02-19 17:46:57,728 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1803 transitions. Word has length 17 [2021-02-19 17:46:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:57,728 INFO L480 AbstractCegarLoop]: Abstraction has 626 states and 1803 transitions. [2021-02-19 17:46:57,728 INFO L481 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) [2021-02-19 17:46:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1803 transitions. [2021-02-19 17:46:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:57,729 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:57,729 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:57,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-02-19 17:46:57,930 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1199975807, now seen corresponding path program 197 times [2021-02-19 17:46:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:57,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813760543] [2021-02-19 17:46:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813760543] [2021-02-19 17:46:58,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260459499] [2021-02-19 17:46:58,147 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 [2021-02-19 17:46:58,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:58,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:58,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:46:58,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,374 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 15 treesize of output 11 [2021-02-19 17:46:58,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:46:58,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:58,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,460 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:46:58,460 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:58,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:58,462 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:46:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:58,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:58,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341769869] [2021-02-19 17:46:58,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:58,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:58,631 INFO L87 Difference]: Start difference. First operand 626 states and 1803 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) [2021-02-19 17:47:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:00,536 INFO L93 Difference]: Finished difference Result 806 states and 2146 transitions. [2021-02-19 17:47:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:47:00,537 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 [2021-02-19 17:47:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:00,538 INFO L225 Difference]: With dead ends: 806 [2021-02-19 17:47:00,538 INFO L226 Difference]: Without dead ends: 802 [2021-02-19 17:47:00,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:47:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-02-19 17:47:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 658. [2021-02-19 17:47:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.898021308980213) internal successors, (1904), 657 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1904 transitions. [2021-02-19 17:47:00,545 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1904 transitions. Word has length 17 [2021-02-19 17:47:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:00,545 INFO L480 AbstractCegarLoop]: Abstraction has 658 states and 1904 transitions. [2021-02-19 17:47:00,545 INFO L481 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) [2021-02-19 17:47:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1904 transitions. [2021-02-19 17:47:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:00,546 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:00,546 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:00,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1587 [2021-02-19 17:47:00,766 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:00,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1376647783, now seen corresponding path program 198 times [2021-02-19 17:47:00,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:00,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551168467] [2021-02-19 17:47:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551168467] [2021-02-19 17:47:00,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358714534] [2021-02-19 17:47:00,995 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 [2021-02-19 17:47:01,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:47:01,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:01,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:01,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,265 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 16 treesize of output 12 [2021-02-19 17:47:01,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,273 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 15 treesize of output 11 [2021-02-19 17:47:01,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,281 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 16 treesize of output 12 [2021-02-19 17:47:01,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:01,289 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 17 treesize of output 13 [2021-02-19 17:47:01,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,362 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:01,362 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:01,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:01,363 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:01,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:01,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790814172] [2021-02-19 17:47:01,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:01,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:01,490 INFO L87 Difference]: Start difference. First operand 658 states and 1904 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) [2021-02-19 17:47:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:02,710 INFO L93 Difference]: Finished difference Result 791 states and 2124 transitions. [2021-02-19 17:47:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:47:02,711 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 [2021-02-19 17:47:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:02,712 INFO L225 Difference]: With dead ends: 791 [2021-02-19 17:47:02,712 INFO L226 Difference]: Without dead ends: 791 [2021-02-19 17:47:02,713 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:47:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-02-19 17:47:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 655. [2021-02-19 17:47:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.8914373088685017) internal successors, (1891), 654 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1891 transitions. [2021-02-19 17:47:02,730 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1891 transitions. Word has length 17 [2021-02-19 17:47:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:02,730 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 1891 transitions. [2021-02-19 17:47:02,730 INFO L481 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) [2021-02-19 17:47:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1891 transitions. [2021-02-19 17:47:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:02,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:02,731 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:02,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1592,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:02,953 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -17960037, now seen corresponding path program 199 times [2021-02-19 17:47:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:02,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437349199] [2021-02-19 17:47:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437349199] [2021-02-19 17:47:03,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932219009] [2021-02-19 17:47:03,190 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 [2021-02-19 17:47:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:03,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:03,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,406 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 16 treesize of output 12 [2021-02-19 17:47:03,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,414 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 [2021-02-19 17:47:03,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,422 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 [2021-02-19 17:47:03,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,430 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 [2021-02-19 17:47:03,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,509 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:03,509 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:03,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:03,510 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:03,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:03,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247013620] [2021-02-19 17:47:03,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:03,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:03,629 INFO L87 Difference]: Start difference. First operand 655 states and 1891 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) [2021-02-19 17:47:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:04,562 INFO L93 Difference]: Finished difference Result 754 states and 2046 transitions. [2021-02-19 17:47:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:47:04,563 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 [2021-02-19 17:47:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:04,564 INFO L225 Difference]: With dead ends: 754 [2021-02-19 17:47:04,564 INFO L226 Difference]: Without dead ends: 750 [2021-02-19 17:47:04,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:47:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-02-19 17:47:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 645. [2021-02-19 17:47:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.87111801242236) internal successors, (1849), 644 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1849 transitions. [2021-02-19 17:47:04,571 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1849 transitions. Word has length 17 [2021-02-19 17:47:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:04,571 INFO L480 AbstractCegarLoop]: Abstraction has 645 states and 1849 transitions. [2021-02-19 17:47:04,571 INFO L481 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) [2021-02-19 17:47:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1849 transitions. [2021-02-19 17:47:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:04,571 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:04,571 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:04,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1596 [2021-02-19 17:47:04,772 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:04,772 INFO L82 PathProgramCache]: Analyzing trace with hash 783656191, now seen corresponding path program 200 times [2021-02-19 17:47:04,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:04,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740648361] [2021-02-19 17:47:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:04,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740648361] [2021-02-19 17:47:04,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514143678] [2021-02-19 17:47:04,927 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 [2021-02-19 17:47:04,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:04,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:05,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,132 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 [2021-02-19 17:47:05,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,141 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 15 treesize of output 11 [2021-02-19 17:47:05,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,149 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 [2021-02-19 17:47:05,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,157 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 [2021-02-19 17:47:05,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,237 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:05,237 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:05,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:05,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:05,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:05,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:05,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070448618] [2021-02-19 17:47:05,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:05,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:05,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:05,423 INFO L87 Difference]: Start difference. First operand 645 states and 1849 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) [2021-02-19 17:47:06,353 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:47:06,616 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:47:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:06,960 INFO L93 Difference]: Finished difference Result 733 states and 2025 transitions. [2021-02-19 17:47:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:47:06,962 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 [2021-02-19 17:47:06,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:06,963 INFO L225 Difference]: With dead ends: 733 [2021-02-19 17:47:06,963 INFO L226 Difference]: Without dead ends: 727 [2021-02-19 17:47:06,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:47:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-02-19 17:47:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 653. [2021-02-19 17:47:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.8588957055214723) internal successors, (1864), 652 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1864 transitions. [2021-02-19 17:47:06,969 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1864 transitions. Word has length 17 [2021-02-19 17:47:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:06,969 INFO L480 AbstractCegarLoop]: Abstraction has 653 states and 1864 transitions. [2021-02-19 17:47:06,969 INFO L481 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) [2021-02-19 17:47:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1864 transitions. [2021-02-19 17:47:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:06,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:06,970 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:07,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1600,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:07,170 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:07,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1792967399, now seen corresponding path program 201 times [2021-02-19 17:47:07,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:07,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712947652] [2021-02-19 17:47:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712947652] [2021-02-19 17:47:07,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432220715] [2021-02-19 17:47:07,326 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 [2021-02-19 17:47:07,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:47:07,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:07,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:47:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:07,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,580 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 15 treesize of output 11 [2021-02-19 17:47:07,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,588 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 16 treesize of output 12 [2021-02-19 17:47:07,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:07,595 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 17 treesize of output 13 [2021-02-19 17:47:07,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,673 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:07,674 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:07,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:07,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:07,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839171091] [2021-02-19 17:47:07,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:07,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:07,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:07,792 INFO L87 Difference]: Start difference. First operand 653 states and 1864 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) [2021-02-19 17:47:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:08,766 INFO L93 Difference]: Finished difference Result 734 states and 2015 transitions. [2021-02-19 17:47:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:47:08,767 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 [2021-02-19 17:47:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:08,768 INFO L225 Difference]: With dead ends: 734 [2021-02-19 17:47:08,768 INFO L226 Difference]: Without dead ends: 732 [2021-02-19 17:47:08,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:47:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-02-19 17:47:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 641. [2021-02-19 17:47:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.846875) internal successors, (1822), 640 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1822 transitions. [2021-02-19 17:47:08,774 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1822 transitions. Word has length 17 [2021-02-19 17:47:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:08,775 INFO L480 AbstractCegarLoop]: Abstraction has 641 states and 1822 transitions. [2021-02-19 17:47:08,775 INFO L481 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) [2021-02-19 17:47:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1822 transitions. [2021-02-19 17:47:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:08,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:08,775 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:08,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:08,976 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash 791386589, now seen corresponding path program 202 times [2021-02-19 17:47:08,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:08,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003716098] [2021-02-19 17:47:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003716098] [2021-02-19 17:47:09,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394148999] [2021-02-19 17:47:09,123 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 [2021-02-19 17:47:09,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:09,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:09,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:09,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,424 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 [2021-02-19 17:47:09,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,431 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 15 treesize of output 11 [2021-02-19 17:47:09,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,483 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:47:09,483 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:09,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:47:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:09,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:09,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646346240] [2021-02-19 17:47:09,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:09,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:09,538 INFO L87 Difference]: Start difference. First operand 641 states and 1822 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) [2021-02-19 17:47:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:10,103 INFO L93 Difference]: Finished difference Result 734 states and 2021 transitions. [2021-02-19 17:47:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:47:10,105 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 [2021-02-19 17:47:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:10,106 INFO L225 Difference]: With dead ends: 734 [2021-02-19 17:47:10,106 INFO L226 Difference]: Without dead ends: 734 [2021-02-19 17:47:10,106 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-02-19 17:47:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 633. [2021-02-19 17:47:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.8512658227848102) internal successors, (1802), 632 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1802 transitions. [2021-02-19 17:47:10,112 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1802 transitions. Word has length 17 [2021-02-19 17:47:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:10,112 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1802 transitions. [2021-02-19 17:47:10,112 INFO L481 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) [2021-02-19 17:47:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1802 transitions. [2021-02-19 17:47:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:10,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:10,113 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:10,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:10,313 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash -38966245, now seen corresponding path program 203 times [2021-02-19 17:47:10,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:10,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047375791] [2021-02-19 17:47:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:10,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047375791] [2021-02-19 17:47:10,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392369067] [2021-02-19 17:47:10,527 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 [2021-02-19 17:47:10,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:47:10,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:10,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:10,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,776 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 16 treesize of output 12 [2021-02-19 17:47:10,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,782 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 15 treesize of output 11 [2021-02-19 17:47:10,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,787 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 [2021-02-19 17:47:10,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:10,792 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 17 treesize of output 13 [2021-02-19 17:47:10,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,853 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:10,853 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:10,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:10,854 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:10,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:10,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:10,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768727113] [2021-02-19 17:47:10,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:10,959 INFO L87 Difference]: Start difference. First operand 633 states and 1802 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) [2021-02-19 17:47:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:11,913 INFO L93 Difference]: Finished difference Result 769 states and 2066 transitions. [2021-02-19 17:47:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:47:11,915 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 [2021-02-19 17:47:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:11,916 INFO L225 Difference]: With dead ends: 769 [2021-02-19 17:47:11,916 INFO L226 Difference]: Without dead ends: 767 [2021-02-19 17:47:11,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:47:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-02-19 17:47:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 655. [2021-02-19 17:47:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.8685015290519877) internal successors, (1876), 654 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1876 transitions. [2021-02-19 17:47:11,922 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1876 transitions. Word has length 17 [2021-02-19 17:47:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:11,922 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 1876 transitions. [2021-02-19 17:47:11,922 INFO L481 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) [2021-02-19 17:47:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1876 transitions. [2021-02-19 17:47:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:11,923 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:11,923 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:12,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1612,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:12,123 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 762649983, now seen corresponding path program 204 times [2021-02-19 17:47:12,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:12,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317643129] [2021-02-19 17:47:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:12,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317643129] [2021-02-19 17:47:12,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294664090] [2021-02-19 17:47:12,308 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 [2021-02-19 17:47:12,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:47:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:12,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,592 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 16 treesize of output 12 [2021-02-19 17:47:12,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,600 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 15 treesize of output 11 [2021-02-19 17:47:12,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,609 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 [2021-02-19 17:47:12,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:12,616 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 [2021-02-19 17:47:12,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,701 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:12,702 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:12,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:12,703 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:12,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:12,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:12,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327002016] [2021-02-19 17:47:12,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:12,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:12,888 INFO L87 Difference]: Start difference. First operand 655 states and 1876 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) [2021-02-19 17:47:14,159 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:47:14,378 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:47:14,752 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:47:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:15,054 INFO L93 Difference]: Finished difference Result 784 states and 2121 transitions. [2021-02-19 17:47:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:47:15,055 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 [2021-02-19 17:47:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:15,056 INFO L225 Difference]: With dead ends: 784 [2021-02-19 17:47:15,056 INFO L226 Difference]: Without dead ends: 773 [2021-02-19 17:47:15,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:47:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-02-19 17:47:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 664. [2021-02-19 17:47:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.8687782805429864) internal successors, (1902), 663 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1902 transitions. [2021-02-19 17:47:15,063 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1902 transitions. Word has length 17 [2021-02-19 17:47:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:15,063 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 1902 transitions. [2021-02-19 17:47:15,063 INFO L481 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) [2021-02-19 17:47:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1902 transitions. [2021-02-19 17:47:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:15,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:15,063 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:15,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1616 [2021-02-19 17:47:15,264 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1813973607, now seen corresponding path program 205 times [2021-02-19 17:47:15,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:15,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186757036] [2021-02-19 17:47:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186757036] [2021-02-19 17:47:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252360502] [2021-02-19 17:47:15,453 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 [2021-02-19 17:47:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:15,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:15,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:15,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:15,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,722 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 15 treesize of output 11 [2021-02-19 17:47:15,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,728 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 16 treesize of output 12 [2021-02-19 17:47:15,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:15,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,793 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:15,793 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:15,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:15,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:15,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:15,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593515226] [2021-02-19 17:47:15,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:15,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:15,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:15,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:15,884 INFO L87 Difference]: Start difference. First operand 664 states and 1902 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) [2021-02-19 17:47:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:17,405 INFO L93 Difference]: Finished difference Result 776 states and 2094 transitions. [2021-02-19 17:47:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:47:17,406 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 [2021-02-19 17:47:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:17,407 INFO L225 Difference]: With dead ends: 776 [2021-02-19 17:47:17,407 INFO L226 Difference]: Without dead ends: 770 [2021-02-19 17:47:17,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:47:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-02-19 17:47:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 649. [2021-02-19 17:47:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8425925925925926) internal successors, (1842), 648 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1842 transitions. [2021-02-19 17:47:17,413 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1842 transitions. Word has length 17 [2021-02-19 17:47:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:17,413 INFO L480 AbstractCegarLoop]: Abstraction has 649 states and 1842 transitions. [2021-02-19 17:47:17,414 INFO L481 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) [2021-02-19 17:47:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1842 transitions. [2021-02-19 17:47:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:17,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:17,414 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:17,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-02-19 17:47:17,616 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 770380381, now seen corresponding path program 206 times [2021-02-19 17:47:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690994841] [2021-02-19 17:47:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690994841] [2021-02-19 17:47:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477603814] [2021-02-19 17:47:17,777 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 [2021-02-19 17:47:17,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:17,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:18,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:18,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,094 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 15 treesize of output 11 [2021-02-19 17:47:18,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,147 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:47:18,147 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:18,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:47:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:18,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:18,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426104012] [2021-02-19 17:47:18,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:18,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:18,204 INFO L87 Difference]: Start difference. First operand 649 states and 1842 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) [2021-02-19 17:47:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:19,538 INFO L93 Difference]: Finished difference Result 757 states and 2054 transitions. [2021-02-19 17:47:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:47:19,539 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 [2021-02-19 17:47:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:19,540 INFO L225 Difference]: With dead ends: 757 [2021-02-19 17:47:19,540 INFO L226 Difference]: Without dead ends: 757 [2021-02-19 17:47:19,540 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:47:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-02-19 17:47:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 646. [2021-02-19 17:47:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.84031007751938) internal successors, (1832), 645 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1832 transitions. [2021-02-19 17:47:19,546 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1832 transitions. Word has length 17 [2021-02-19 17:47:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:19,546 INFO L480 AbstractCegarLoop]: Abstraction has 646 states and 1832 transitions. [2021-02-19 17:47:19,546 INFO L481 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) [2021-02-19 17:47:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1832 transitions. [2021-02-19 17:47:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:19,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:19,547 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:19,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1625,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:19,748 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash -719024615, now seen corresponding path program 207 times [2021-02-19 17:47:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:19,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487873031] [2021-02-19 17:47:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487873031] [2021-02-19 17:47:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000225096] [2021-02-19 17:47:19,930 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 [2021-02-19 17:47:19,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:19,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:20,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:20,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:20,265 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 15 treesize of output 11 [2021-02-19 17:47:20,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:20,272 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 [2021-02-19 17:47:20,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,324 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:47:20,324 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:20,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:47:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:20,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-02-19 17:47:20,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511279415] [2021-02-19 17:47:20,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:20,381 INFO L87 Difference]: Start difference. First operand 646 states and 1832 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) [2021-02-19 17:47:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:21,028 INFO L93 Difference]: Finished difference Result 706 states and 1953 transitions. [2021-02-19 17:47:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:47:21,030 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 [2021-02-19 17:47:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:21,031 INFO L225 Difference]: With dead ends: 706 [2021-02-19 17:47:21,031 INFO L226 Difference]: Without dead ends: 706 [2021-02-19 17:47:21,031 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-02-19 17:47:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 643. [2021-02-19 17:47:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.8426791277258565) internal successors, (1825), 642 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) [2021-02-19 17:47:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1825 transitions. [2021-02-19 17:47:21,037 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1825 transitions. Word has length 17 [2021-02-19 17:47:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:21,037 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 1825 transitions. [2021-02-19 17:47:21,037 INFO L481 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) [2021-02-19 17:47:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1825 transitions. [2021-02-19 17:47:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:21,038 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:21,038 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:21,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:21,238 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash -690158693, now seen corresponding path program 208 times [2021-02-19 17:47:21,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:21,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280725280] [2021-02-19 17:47:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:21,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280725280] [2021-02-19 17:47:21,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860974616] [2021-02-19 17:47:21,482 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 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 [2021-02-19 17:47:21,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:21,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,814 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 [2021-02-19 17:47:21,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,821 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 [2021-02-19 17:47:21,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,828 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 17 treesize of output 13 [2021-02-19 17:47:21,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,895 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:21,896 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:21,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:21,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:21,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:21,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9790134] [2021-02-19 17:47:21,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:21,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:21,998 INFO L87 Difference]: Start difference. First operand 643 states and 1825 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) [2021-02-19 17:47:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:23,074 INFO L93 Difference]: Finished difference Result 794 states and 2101 transitions. [2021-02-19 17:47:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:47:23,075 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 [2021-02-19 17:47:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:23,076 INFO L225 Difference]: With dead ends: 794 [2021-02-19 17:47:23,077 INFO L226 Difference]: Without dead ends: 794 [2021-02-19 17:47:23,077 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-02-19 17:47:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 672. [2021-02-19 17:47:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 2.855439642324888) internal successors, (1916), 671 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1916 transitions. [2021-02-19 17:47:23,083 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1916 transitions. Word has length 17 [2021-02-19 17:47:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:23,083 INFO L480 AbstractCegarLoop]: Abstraction has 672 states and 1916 transitions. [2021-02-19 17:47:23,083 INFO L481 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) [2021-02-19 17:47:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1916 transitions. [2021-02-19 17:47:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:23,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:23,084 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:23,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1631,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:23,284 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash 111457535, now seen corresponding path program 209 times [2021-02-19 17:47:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:23,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590563687] [2021-02-19 17:47:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:23,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590563687] [2021-02-19 17:47:23,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408497513] [2021-02-19 17:47:23,499 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 [2021-02-19 17:47:23,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:47:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,775 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 [2021-02-19 17:47:23,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:23,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,792 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 [2021-02-19 17:47:23,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:23,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:23,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,860 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:23,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:23,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:23,862 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:24,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:24,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:24,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972894808] [2021-02-19 17:47:24,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:24,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:24,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:24,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:24,040 INFO L87 Difference]: Start difference. First operand 672 states and 1916 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) [2021-02-19 17:47:24,751 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:47:24,955 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:47:25,203 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:47:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:26,340 INFO L93 Difference]: Finished difference Result 820 states and 2164 transitions. [2021-02-19 17:47:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 17:47:26,342 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 [2021-02-19 17:47:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:26,343 INFO L225 Difference]: With dead ends: 820 [2021-02-19 17:47:26,343 INFO L226 Difference]: Without dead ends: 810 [2021-02-19 17:47:26,343 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:47:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-02-19 17:47:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 681. [2021-02-19 17:47:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 2.8573529411764707) internal successors, (1943), 680 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1943 transitions. [2021-02-19 17:47:26,352 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1943 transitions. Word has length 17 [2021-02-19 17:47:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:26,352 INFO L480 AbstractCegarLoop]: Abstraction has 681 states and 1943 transitions. [2021-02-19 17:47:26,352 INFO L481 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) [2021-02-19 17:47:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1943 transitions. [2021-02-19 17:47:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:26,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:26,353 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:26,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1635 [2021-02-19 17:47:26,554 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1829801241, now seen corresponding path program 210 times [2021-02-19 17:47:26,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:26,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219152115] [2021-02-19 17:47:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:26,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219152115] [2021-02-19 17:47:26,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771486242] [2021-02-19 17:47:26,765 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 [2021-02-19 17:47:26,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:47:26,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:27,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:27,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,029 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 15 treesize of output 11 [2021-02-19 17:47:27,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,037 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 16 treesize of output 12 [2021-02-19 17:47:27,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,044 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 17 treesize of output 13 [2021-02-19 17:47:27,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,127 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:27,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:27,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:27,129 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:27,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:27,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752852940] [2021-02-19 17:47:27,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:27,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:27,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:27,261 INFO L87 Difference]: Start difference. First operand 681 states and 1943 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) [2021-02-19 17:47:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:28,905 INFO L93 Difference]: Finished difference Result 797 states and 2135 transitions. [2021-02-19 17:47:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:47:28,907 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 [2021-02-19 17:47:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:28,908 INFO L225 Difference]: With dead ends: 797 [2021-02-19 17:47:28,908 INFO L226 Difference]: Without dead ends: 797 [2021-02-19 17:47:28,908 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:47:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-02-19 17:47:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 672. [2021-02-19 17:47:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 2.8450074515648285) internal successors, (1909), 671 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1909 transitions. [2021-02-19 17:47:28,916 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1909 transitions. Word has length 17 [2021-02-19 17:47:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:28,917 INFO L480 AbstractCegarLoop]: Abstraction has 672 states and 1909 transitions. [2021-02-19 17:47:28,917 INFO L481 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) [2021-02-19 17:47:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1909 transitions. [2021-02-19 17:47:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:28,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:28,918 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:29,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1640,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:29,138 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 119187933, now seen corresponding path program 211 times [2021-02-19 17:47:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:29,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477628707] [2021-02-19 17:47:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477628707] [2021-02-19 17:47:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822999135] [2021-02-19 17:47:29,345 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 [2021-02-19 17:47:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:29,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,748 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 [2021-02-19 17:47:29,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,756 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 16 treesize of output 12 [2021-02-19 17:47:29,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,811 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:47:29,811 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:29,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:47:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:29,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:29,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040527724] [2021-02-19 17:47:29,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:29,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:29,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:29,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:29,882 INFO L87 Difference]: Start difference. First operand 672 states and 1909 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) [2021-02-19 17:47:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:31,771 INFO L93 Difference]: Finished difference Result 837 states and 2220 transitions. [2021-02-19 17:47:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:47:31,774 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 [2021-02-19 17:47:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:31,775 INFO L225 Difference]: With dead ends: 837 [2021-02-19 17:47:31,775 INFO L226 Difference]: Without dead ends: 837 [2021-02-19 17:47:31,775 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:47:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-02-19 17:47:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 670. [2021-02-19 17:47:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.8445440956651717) internal successors, (1903), 669 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1903 transitions. [2021-02-19 17:47:31,782 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1903 transitions. Word has length 17 [2021-02-19 17:47:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:31,782 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1903 transitions. [2021-02-19 17:47:31,782 INFO L481 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) [2021-02-19 17:47:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1903 transitions. [2021-02-19 17:47:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:31,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:31,783 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:31,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-02-19 17:47:31,983 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:31,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1370217063, now seen corresponding path program 212 times [2021-02-19 17:47:31,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:31,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780032126] [2021-02-19 17:47:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780032126] [2021-02-19 17:47:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914534158] [2021-02-19 17:47:32,182 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 [2021-02-19 17:47:32,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:32,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:32,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:32,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,557 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 15 treesize of output 11 [2021-02-19 17:47:32,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,610 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:47:32,610 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:32,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:47:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:32,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:32,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:32,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700625773] [2021-02-19 17:47:32,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:32,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:32,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:32,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:32,667 INFO L87 Difference]: Start difference. First operand 670 states and 1903 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) [2021-02-19 17:47:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:34,923 INFO L93 Difference]: Finished difference Result 818 states and 2204 transitions. [2021-02-19 17:47:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:47:34,925 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 [2021-02-19 17:47:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:34,926 INFO L225 Difference]: With dead ends: 818 [2021-02-19 17:47:34,926 INFO L226 Difference]: Without dead ends: 818 [2021-02-19 17:47:34,926 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:47:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-02-19 17:47:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 669. [2021-02-19 17:47:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.844311377245509) internal successors, (1900), 668 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1900 transitions. [2021-02-19 17:47:34,937 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1900 transitions. Word has length 17 [2021-02-19 17:47:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:34,937 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 1900 transitions. [2021-02-19 17:47:34,937 INFO L481 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) [2021-02-19 17:47:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1900 transitions. [2021-02-19 17:47:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:34,938 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:34,938 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:35,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-02-19 17:47:35,138 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash -297131683, now seen corresponding path program 213 times [2021-02-19 17:47:35,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:35,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554302098] [2021-02-19 17:47:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:35,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554302098] [2021-02-19 17:47:35,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281660415] [2021-02-19 17:47:35,338 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 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 [2021-02-19 17:47:35,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:35,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:35,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,708 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 [2021-02-19 17:47:35,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,715 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 [2021-02-19 17:47:35,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,769 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:47:35,769 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:35,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,771 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:47:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:35,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:35,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:35,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164526223] [2021-02-19 17:47:35,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:35,829 INFO L87 Difference]: Start difference. First operand 669 states and 1900 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) [2021-02-19 17:47:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:36,547 INFO L93 Difference]: Finished difference Result 716 states and 1991 transitions. [2021-02-19 17:47:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:47:36,548 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 [2021-02-19 17:47:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:36,549 INFO L225 Difference]: With dead ends: 716 [2021-02-19 17:47:36,549 INFO L226 Difference]: Without dead ends: 716 [2021-02-19 17:47:36,550 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-02-19 17:47:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 669. [2021-02-19 17:47:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.844311377245509) internal successors, (1900), 668 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1900 transitions. [2021-02-19 17:47:36,556 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1900 transitions. Word has length 17 [2021-02-19 17:47:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:36,556 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 1900 transitions. [2021-02-19 17:47:36,556 INFO L481 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) [2021-02-19 17:47:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1900 transitions. [2021-02-19 17:47:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:36,556 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:36,556 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:36,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-02-19 17:47:36,757 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash 906074335, now seen corresponding path program 214 times [2021-02-19 17:47:36,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:36,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841586424] [2021-02-19 17:47:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:37,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841586424] [2021-02-19 17:47:37,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751700248] [2021-02-19 17:47:37,015 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) [2021-02-19 17:47:37,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:37,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:37,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:37,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,454 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 16 treesize of output 12 [2021-02-19 17:47:37,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,500 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:47:37,501 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:37,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:47:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:37,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:37,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:37,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49376807] [2021-02-19 17:47:37,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:37,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:37,566 INFO L87 Difference]: Start difference. First operand 669 states and 1900 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) [2021-02-19 17:47:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:38,095 INFO L93 Difference]: Finished difference Result 784 states and 2105 transitions. [2021-02-19 17:47:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:47:38,097 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 [2021-02-19 17:47:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:38,098 INFO L225 Difference]: With dead ends: 784 [2021-02-19 17:47:38,098 INFO L226 Difference]: Without dead ends: 784 [2021-02-19 17:47:38,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-02-19 17:47:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 695. [2021-02-19 17:47:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.8487031700288186) internal successors, (1977), 694 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1977 transitions. [2021-02-19 17:47:38,106 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1977 transitions. Word has length 17 [2021-02-19 17:47:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:38,106 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 1977 transitions. [2021-02-19 17:47:38,106 INFO L481 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) [2021-02-19 17:47:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1977 transitions. [2021-02-19 17:47:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:38,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:38,106 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:38,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-02-19 17:47:38,307 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1836956923, now seen corresponding path program 215 times [2021-02-19 17:47:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933548113] [2021-02-19 17:47:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:38,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933548113] [2021-02-19 17:47:38,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289219501] [2021-02-19 17:47:38,501 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 [2021-02-19 17:47:38,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:38,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:38,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:47:38,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:38,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,895 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 [2021-02-19 17:47:38,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,904 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 17 treesize of output 13 [2021-02-19 17:47:38,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:38,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:38,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,991 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:47:38,992 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:38,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:47:38,993 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:47:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:39,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:39,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:39,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357460074] [2021-02-19 17:47:39,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:39,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:39,084 INFO L87 Difference]: Start difference. First operand 695 states and 1977 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) [2021-02-19 17:47:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:40,095 INFO L93 Difference]: Finished difference Result 769 states and 2066 transitions. [2021-02-19 17:47:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:40,096 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 [2021-02-19 17:47:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:40,097 INFO L225 Difference]: With dead ends: 769 [2021-02-19 17:47:40,097 INFO L226 Difference]: Without dead ends: 761 [2021-02-19 17:47:40,097 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:47:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-02-19 17:47:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 701. [2021-02-19 17:47:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.8328571428571427) internal successors, (1983), 700 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1983 transitions. [2021-02-19 17:47:40,104 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1983 transitions. Word has length 17 [2021-02-19 17:47:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:40,104 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 1983 transitions. [2021-02-19 17:47:40,104 INFO L481 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) [2021-02-19 17:47:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1983 transitions. [2021-02-19 17:47:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:40,105 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:40,105 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:40,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-02-19 17:47:40,305 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -254947779, now seen corresponding path program 216 times [2021-02-19 17:47:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:40,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884327770] [2021-02-19 17:47:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:40,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884327770] [2021-02-19 17:47:40,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021377376] [2021-02-19 17:47:40,511 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 [2021-02-19 17:47:40,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:40,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,934 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 [2021-02-19 17:47:40,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:40,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,991 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:47:40,991 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:40,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:47:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:41,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241950792] [2021-02-19 17:47:41,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:41,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:41,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:41,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:41,056 INFO L87 Difference]: Start difference. First operand 701 states and 1983 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) [2021-02-19 17:47:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:43,738 INFO L93 Difference]: Finished difference Result 855 states and 2233 transitions. [2021-02-19 17:47:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:47:43,740 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 [2021-02-19 17:47:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:43,741 INFO L225 Difference]: With dead ends: 855 [2021-02-19 17:47:43,741 INFO L226 Difference]: Without dead ends: 855 [2021-02-19 17:47:43,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 17:47:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-02-19 17:47:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 696. [2021-02-19 17:47:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.8460431654676257) internal successors, (1978), 695 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1978 transitions. [2021-02-19 17:47:43,748 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1978 transitions. Word has length 17 [2021-02-19 17:47:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:43,748 INFO L480 AbstractCegarLoop]: Abstraction has 696 states and 1978 transitions. [2021-02-19 17:47:43,748 INFO L481 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) [2021-02-19 17:47:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1978 transitions. [2021-02-19 17:47:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:43,749 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:43,749 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:43,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1660,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:43,950 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1299101345, now seen corresponding path program 217 times [2021-02-19 17:47:43,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:43,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652057451] [2021-02-19 17:47:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652057451] [2021-02-19 17:47:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328798904] [2021-02-19 17:47:44,157 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 [2021-02-19 17:47:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:44,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:47:44,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,605 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 [2021-02-19 17:47:44,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,612 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 7 treesize of output 5 [2021-02-19 17:47:44,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,622 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 17 treesize of output 13 [2021-02-19 17:47:44,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:44,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:44,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,714 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:47:44,714 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:44,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:47:44,716 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:47:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:44,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:44,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:44,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815608477] [2021-02-19 17:47:44,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:44,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:44,812 INFO L87 Difference]: Start difference. First operand 696 states and 1978 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) [2021-02-19 17:47:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:46,350 INFO L93 Difference]: Finished difference Result 787 states and 2117 transitions. [2021-02-19 17:47:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:47:46,352 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 [2021-02-19 17:47:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:46,353 INFO L225 Difference]: With dead ends: 787 [2021-02-19 17:47:46,353 INFO L226 Difference]: Without dead ends: 784 [2021-02-19 17:47:46,353 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:47:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-02-19 17:47:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 707. [2021-02-19 17:47:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.84985835694051) internal successors, (2012), 706 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2012 transitions. [2021-02-19 17:47:46,360 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2012 transitions. Word has length 17 [2021-02-19 17:47:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:46,360 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2012 transitions. [2021-02-19 17:47:46,360 INFO L481 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) [2021-02-19 17:47:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2012 transitions. [2021-02-19 17:47:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:46,361 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:46,361 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:46,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1662 [2021-02-19 17:47:46,561 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:46,561 INFO L82 PathProgramCache]: Analyzing trace with hash -15305441, now seen corresponding path program 218 times [2021-02-19 17:47:46,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:46,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356959835] [2021-02-19 17:47:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:46,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356959835] [2021-02-19 17:47:46,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995429578] [2021-02-19 17:47:46,808 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 [2021-02-19 17:47:46,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:46,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:46,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,220 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 15 treesize of output 11 [2021-02-19 17:47:47,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,229 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 16 treesize of output 12 [2021-02-19 17:47:47,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,270 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:47:47,270 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:47,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:47:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:47,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:47,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:47,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299812898] [2021-02-19 17:47:47,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:47,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:47,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:47,317 INFO L87 Difference]: Start difference. First operand 707 states and 2012 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) [2021-02-19 17:47:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:49,273 INFO L93 Difference]: Finished difference Result 818 states and 2189 transitions. [2021-02-19 17:47:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:47:49,275 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 [2021-02-19 17:47:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:49,276 INFO L225 Difference]: With dead ends: 818 [2021-02-19 17:47:49,276 INFO L226 Difference]: Without dead ends: 818 [2021-02-19 17:47:49,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:47:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-02-19 17:47:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 694. [2021-02-19 17:47:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.854256854256854) internal successors, (1978), 693 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1978 transitions. [2021-02-19 17:47:49,283 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1978 transitions. Word has length 17 [2021-02-19 17:47:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:49,283 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1978 transitions. [2021-02-19 17:47:49,283 INFO L481 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) [2021-02-19 17:47:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1978 transitions. [2021-02-19 17:47:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:49,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:49,284 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:49,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:49,484 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -935006149, now seen corresponding path program 219 times [2021-02-19 17:47:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866739917] [2021-02-19 17:47:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:49,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866739917] [2021-02-19 17:47:49,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869576542] [2021-02-19 17:47:49,732 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 [2021-02-19 17:47:49,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:49,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:50,112 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 7 treesize of output 5 [2021-02-19 17:47:50,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,123 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 [2021-02-19 17:47:50,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:47:50,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:50,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:50,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:50,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,235 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-02-19 17:47:50,235 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:50,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:47:50,237 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-02-19 17:47:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:50,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:50,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:50,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888065477] [2021-02-19 17:47:50,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:50,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:50,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:50,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:50,341 INFO L87 Difference]: Start difference. First operand 694 states and 1978 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) [2021-02-19 17:47:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:51,600 INFO L93 Difference]: Finished difference Result 744 states and 2044 transitions. [2021-02-19 17:47:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:47:51,602 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 [2021-02-19 17:47:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:51,603 INFO L225 Difference]: With dead ends: 744 [2021-02-19 17:47:51,603 INFO L226 Difference]: Without dead ends: 742 [2021-02-19 17:47:51,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:47:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-02-19 17:47:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 694. [2021-02-19 17:47:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.8528138528138527) internal successors, (1977), 693 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1977 transitions. [2021-02-19 17:47:51,610 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1977 transitions. Word has length 17 [2021-02-19 17:47:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:51,610 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1977 transitions. [2021-02-19 17:47:51,610 INFO L481 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) [2021-02-19 17:47:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1977 transitions. [2021-02-19 17:47:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:51,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:51,611 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:51,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1669 [2021-02-19 17:47:51,811 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash -7575043, now seen corresponding path program 220 times [2021-02-19 17:47:51,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:51,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072088243] [2021-02-19 17:47:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:52,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072088243] [2021-02-19 17:47:52,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368978055] [2021-02-19 17:47:52,100 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 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 [2021-02-19 17:47:52,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:52,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,487 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 [2021-02-19 17:47:52,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,494 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 15 treesize of output 11 [2021-02-19 17:47:52,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,501 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 [2021-02-19 17:47:52,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,507 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 17 treesize of output 13 [2021-02-19 17:47:52,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,571 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:52,572 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:52,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:52,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:52,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:52,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:52,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859871404] [2021-02-19 17:47:52,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:52,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:52,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:52,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:52,672 INFO L87 Difference]: Start difference. First operand 694 states and 1977 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) [2021-02-19 17:47:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:54,341 INFO L93 Difference]: Finished difference Result 791 states and 2106 transitions. [2021-02-19 17:47:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:47:54,343 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 [2021-02-19 17:47:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:54,344 INFO L225 Difference]: With dead ends: 791 [2021-02-19 17:47:54,344 INFO L226 Difference]: Without dead ends: 791 [2021-02-19 17:47:54,344 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:47:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-02-19 17:47:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 685. [2021-02-19 17:47:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.8435672514619883) internal successors, (1945), 684 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1945 transitions. [2021-02-19 17:47:54,351 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1945 transitions. Word has length 17 [2021-02-19 17:47:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:54,351 INFO L480 AbstractCegarLoop]: Abstraction has 685 states and 1945 transitions. [2021-02-19 17:47:54,351 INFO L481 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) [2021-02-19 17:47:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1945 transitions. [2021-02-19 17:47:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:54,352 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:54,352 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:54,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1674 [2021-02-19 17:47:54,552 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 794041185, now seen corresponding path program 221 times [2021-02-19 17:47:54,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:54,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825893181] [2021-02-19 17:47:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:54,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825893181] [2021-02-19 17:47:54,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469990549] [2021-02-19 17:47:54,879 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 [2021-02-19 17:47:54,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:54,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:54,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:54,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:55,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,263 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 16 treesize of output 12 [2021-02-19 17:47:55,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,273 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 15 treesize of output 11 [2021-02-19 17:47:55,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,282 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 [2021-02-19 17:47:55,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,290 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 [2021-02-19 17:47:55,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,392 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:55,392 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:55,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:55,394 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:55,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:55,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829409781] [2021-02-19 17:47:55,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:55,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:55,614 INFO L87 Difference]: Start difference. First operand 685 states and 1945 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) [2021-02-19 17:47:56,312 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:47:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:56,805 INFO L93 Difference]: Finished difference Result 759 states and 2062 transitions. [2021-02-19 17:47:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:47:56,807 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 [2021-02-19 17:47:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:56,808 INFO L225 Difference]: With dead ends: 759 [2021-02-19 17:47:56,808 INFO L226 Difference]: Without dead ends: 756 [2021-02-19 17:47:56,808 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:47:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-02-19 17:47:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 685. [2021-02-19 17:47:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.840643274853801) internal successors, (1943), 684 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1943 transitions. [2021-02-19 17:47:56,819 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1943 transitions. Word has length 17 [2021-02-19 17:47:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:56,819 INFO L480 AbstractCegarLoop]: Abstraction has 685 states and 1943 transitions. [2021-02-19 17:47:56,820 INFO L481 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) [2021-02-19 17:47:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1943 transitions. [2021-02-19 17:47:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:56,820 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:56,820 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:57,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1678 [2021-02-19 17:47:57,021 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1782582405, now seen corresponding path program 222 times [2021-02-19 17:47:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:57,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517236132] [2021-02-19 17:47:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:57,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517236132] [2021-02-19 17:47:57,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923413005] [2021-02-19 17:47:57,301 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 [2021-02-19 17:47:57,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:47:57,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:57,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:57,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,614 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 [2021-02-19 17:47:57,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:57,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,626 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 16 treesize of output 12 [2021-02-19 17:47:57,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,631 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 17 treesize of output 13 [2021-02-19 17:47:57,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,713 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:57,713 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:57,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:57,715 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:57,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:57,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:57,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473874950] [2021-02-19 17:47:57,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:57,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:57,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:57,877 INFO L87 Difference]: Start difference. First operand 685 states and 1943 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) [2021-02-19 17:47:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:58,812 INFO L93 Difference]: Finished difference Result 756 states and 2059 transitions. [2021-02-19 17:47:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:47:58,815 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 [2021-02-19 17:47:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:58,816 INFO L225 Difference]: With dead ends: 756 [2021-02-19 17:47:58,816 INFO L226 Difference]: Without dead ends: 756 [2021-02-19 17:47:58,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:47:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-02-19 17:47:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 685. [2021-02-19 17:47:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.840643274853801) internal successors, (1943), 684 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1943 transitions. [2021-02-19 17:47:58,823 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1943 transitions. Word has length 17 [2021-02-19 17:47:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:58,823 INFO L480 AbstractCegarLoop]: Abstraction has 685 states and 1943 transitions. [2021-02-19 17:47:58,823 INFO L481 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) [2021-02-19 17:47:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1943 transitions. [2021-02-19 17:47:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:58,824 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:58,824 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:59,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1683 [2021-02-19 17:47:59,038 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash 505854555, now seen corresponding path program 223 times [2021-02-19 17:47:59,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:59,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622578483] [2021-02-19 17:47:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:47:59,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622578483] [2021-02-19 17:47:59,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724174677] [2021-02-19 17:47:59,281 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 [2021-02-19 17:47:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:59,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:59,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,559 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 15 treesize of output 11 [2021-02-19 17:47:59,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:47:59,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,577 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 17 treesize of output 13 [2021-02-19 17:47:59,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,661 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:47:59,661 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:47:59,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:59,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:47:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:59,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:59,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:47:59,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230736674] [2021-02-19 17:47:59,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:59,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:59,865 INFO L87 Difference]: Start difference. First operand 685 states and 1943 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) [2021-02-19 17:48:01,017 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:48:01,307 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 17:48:01,468 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:48:02,024 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:48:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:02,054 INFO L93 Difference]: Finished difference Result 712 states and 1982 transitions. [2021-02-19 17:48:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:48:02,055 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 [2021-02-19 17:48:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:02,056 INFO L225 Difference]: With dead ends: 712 [2021-02-19 17:48:02,056 INFO L226 Difference]: Without dead ends: 708 [2021-02-19 17:48:02,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:48:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-02-19 17:48:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 681. [2021-02-19 17:48:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 2.836764705882353) internal successors, (1929), 680 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1929 transitions. [2021-02-19 17:48:02,063 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1929 transitions. Word has length 17 [2021-02-19 17:48:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:02,063 INFO L480 AbstractCegarLoop]: Abstraction has 681 states and 1929 transitions. [2021-02-19 17:48:02,063 INFO L481 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) [2021-02-19 17:48:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1929 transitions. [2021-02-19 17:48:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:02,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:02,063 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:02,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1687,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:02,266 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1517986247, now seen corresponding path program 224 times [2021-02-19 17:48:02,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:02,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634603331] [2021-02-19 17:48:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634603331] [2021-02-19 17:48:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307462439] [2021-02-19 17:48:02,462 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 [2021-02-19 17:48:02,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:02,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:02,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:48:02,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:02,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:48:02,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,813 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 [2021-02-19 17:48:02,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,915 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:02,916 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:02,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:02,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:03,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:03,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-02-19 17:48:03,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036297302] [2021-02-19 17:48:03,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:03,083 INFO L87 Difference]: Start difference. First operand 681 states and 1929 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) [2021-02-19 17:48:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:03,976 INFO L93 Difference]: Finished difference Result 808 states and 2154 transitions. [2021-02-19 17:48:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:03,978 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 [2021-02-19 17:48:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:03,979 INFO L225 Difference]: With dead ends: 808 [2021-02-19 17:48:03,979 INFO L226 Difference]: Without dead ends: 808 [2021-02-19 17:48:03,979 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-02-19 17:48:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 700. [2021-02-19 17:48:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.8512160228898424) internal successors, (1993), 699 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1993 transitions. [2021-02-19 17:48:03,985 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1993 transitions. Word has length 17 [2021-02-19 17:48:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:03,986 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 1993 transitions. [2021-02-19 17:48:03,986 INFO L481 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) [2021-02-19 17:48:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1993 transitions. [2021-02-19 17:48:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:03,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:03,986 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:04,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-02-19 17:48:04,187 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -716370019, now seen corresponding path program 225 times [2021-02-19 17:48:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418435528] [2021-02-19 17:48:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:04,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418435528] [2021-02-19 17:48:04,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104024759] [2021-02-19 17:48:04,380 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 [2021-02-19 17:48:04,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:48:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:04,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:04,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,615 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 16 treesize of output 12 [2021-02-19 17:48:04,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,622 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 [2021-02-19 17:48:04,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:48:04,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:48:04,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,730 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:04,730 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:04,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:04,732 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:04,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:04,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-02-19 17:48:04,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138442522] [2021-02-19 17:48:04,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:04,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:04,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:04,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:04,946 INFO L87 Difference]: Start difference. First operand 700 states and 1993 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) [2021-02-19 17:48:05,709 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:48:05,943 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:48:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:06,384 INFO L93 Difference]: Finished difference Result 788 states and 2136 transitions. [2021-02-19 17:48:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:48:06,387 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 [2021-02-19 17:48:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:06,388 INFO L225 Difference]: With dead ends: 788 [2021-02-19 17:48:06,388 INFO L226 Difference]: Without dead ends: 782 [2021-02-19 17:48:06,388 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-02-19 17:48:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 703. [2021-02-19 17:48:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.849002849002849) internal successors, (2000), 702 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2000 transitions. [2021-02-19 17:48:06,395 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2000 transitions. Word has length 17 [2021-02-19 17:48:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:06,395 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 2000 transitions. [2021-02-19 17:48:06,395 INFO L481 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) [2021-02-19 17:48:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2000 transitions. [2021-02-19 17:48:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:06,395 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:06,395 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:06,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1697 [2021-02-19 17:48:06,596 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1001973687, now seen corresponding path program 226 times [2021-02-19 17:48:06,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:06,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905430269] [2021-02-19 17:48:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905430269] [2021-02-19 17:48:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467744605] [2021-02-19 17:48:06,794 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 [2021-02-19 17:48:06,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:07,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,130 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 [2021-02-19 17:48:07,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,140 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 15 treesize of output 11 [2021-02-19 17:48:07,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,150 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 16 treesize of output 12 [2021-02-19 17:48:07,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:48:07,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,260 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:07,261 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:07,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:07,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:07,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:07,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-02-19 17:48:07,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993805666] [2021-02-19 17:48:07,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:07,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:07,408 INFO L87 Difference]: Start difference. First operand 703 states and 2000 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) [2021-02-19 17:48:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:08,325 INFO L93 Difference]: Finished difference Result 781 states and 2122 transitions. [2021-02-19 17:48:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:08,326 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 [2021-02-19 17:48:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:08,327 INFO L225 Difference]: With dead ends: 781 [2021-02-19 17:48:08,327 INFO L226 Difference]: Without dead ends: 781 [2021-02-19 17:48:08,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-02-19 17:48:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 698. [2021-02-19 17:48:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.840746054519369) internal successors, (1980), 697 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1980 transitions. [2021-02-19 17:48:08,334 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1980 transitions. Word has length 17 [2021-02-19 17:48:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:08,334 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1980 transitions. [2021-02-19 17:48:08,334 INFO L481 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) [2021-02-19 17:48:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1980 transitions. [2021-02-19 17:48:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:08,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:08,335 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:08,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1702 [2021-02-19 17:48:08,535 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash -708639621, now seen corresponding path program 227 times [2021-02-19 17:48:08,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:08,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296877656] [2021-02-19 17:48:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:08,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296877656] [2021-02-19 17:48:08,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059721809] [2021-02-19 17:48:08,740 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 [2021-02-19 17:48:08,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:48:08,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:09,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,176 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 16 treesize of output 12 [2021-02-19 17:48:09,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:09,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,252 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:48:09,253 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:09,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,255 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:48:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:09,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:09,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-02-19 17:48:09,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930174775] [2021-02-19 17:48:09,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:09,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:09,322 INFO L87 Difference]: Start difference. First operand 698 states and 1980 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) [2021-02-19 17:48:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:09,820 INFO L93 Difference]: Finished difference Result 783 states and 2124 transitions. [2021-02-19 17:48:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:48:09,823 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 [2021-02-19 17:48:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:09,824 INFO L225 Difference]: With dead ends: 783 [2021-02-19 17:48:09,824 INFO L226 Difference]: Without dead ends: 783 [2021-02-19 17:48:09,824 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-02-19 17:48:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 698. [2021-02-19 17:48:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.840746054519369) internal successors, (1980), 697 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1980 transitions. [2021-02-19 17:48:09,831 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1980 transitions. Word has length 17 [2021-02-19 17:48:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:09,831 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1980 transitions. [2021-02-19 17:48:09,831 INFO L481 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) [2021-02-19 17:48:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1980 transitions. [2021-02-19 17:48:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:09,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:09,831 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:10,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1706,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:10,032 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash -561657509, now seen corresponding path program 228 times [2021-02-19 17:48:10,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:10,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346885854] [2021-02-19 17:48:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:48:10,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346885854] [2021-02-19 17:48:10,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732110278] [2021-02-19 17:48:10,159 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 [2021-02-19 17:48:10,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:10,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:10,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,494 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 [2021-02-19 17:48:10,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,504 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 15 treesize of output 11 [2021-02-19 17:48:10,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,514 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 [2021-02-19 17:48:10,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:48:10,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,633 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:10,634 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:10,634 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:10,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:10,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:10,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:10,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-02-19 17:48:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366283613] [2021-02-19 17:48:10,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:10,850 INFO L87 Difference]: Start difference. First operand 698 states and 1980 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) [2021-02-19 17:48:11,905 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 17:48:12,093 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:48:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:12,376 INFO L93 Difference]: Finished difference Result 743 states and 2046 transitions. [2021-02-19 17:48:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:48:12,376 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 [2021-02-19 17:48:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:12,377 INFO L225 Difference]: With dead ends: 743 [2021-02-19 17:48:12,377 INFO L226 Difference]: Without dead ends: 739 [2021-02-19 17:48:12,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:48:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-02-19 17:48:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 697. [2021-02-19 17:48:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.836206896551724) internal successors, (1974), 696 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1974 transitions. [2021-02-19 17:48:12,383 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1974 transitions. Word has length 17 [2021-02-19 17:48:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:12,383 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 1974 transitions. [2021-02-19 17:48:12,384 INFO L481 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) [2021-02-19 17:48:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1974 transitions. [2021-02-19 17:48:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:12,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:12,384 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:12,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-02-19 17:48:12,585 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1167389825, now seen corresponding path program 229 times [2021-02-19 17:48:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:12,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758539779] [2021-02-19 17:48:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:48:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758539779] [2021-02-19 17:48:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710170322] [2021-02-19 17:48:12,695 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 [2021-02-19 17:48:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:12,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:12,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:13,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,128 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 16 treesize of output 12 [2021-02-19 17:48:13,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:13,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:13,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:13,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,168 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 [2021-02-19 17:48:13,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:13,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,281 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:48:13,282 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:48:13,282 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:13,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:48:13,291 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:48:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:13,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-02-19 17:48:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840569532] [2021-02-19 17:48:13,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:13,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:13,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:13,380 INFO L87 Difference]: Start difference. First operand 697 states and 1974 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) [2021-02-19 17:48:14,262 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:48:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:14,601 INFO L93 Difference]: Finished difference Result 719 states and 2005 transitions. [2021-02-19 17:48:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:14,601 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 [2021-02-19 17:48:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:14,602 INFO L225 Difference]: With dead ends: 719 [2021-02-19 17:48:14,602 INFO L226 Difference]: Without dead ends: 711 [2021-02-19 17:48:14,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-02-19 17:48:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 696. [2021-02-19 17:48:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.8316546762589927) internal successors, (1968), 695 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) [2021-02-19 17:48:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1968 transitions. [2021-02-19 17:48:14,608 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1968 transitions. Word has length 17 [2021-02-19 17:48:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:14,608 INFO L480 AbstractCegarLoop]: Abstraction has 696 states and 1968 transitions. [2021-02-19 17:48:14,608 INFO L481 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) [2021-02-19 17:48:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1968 transitions. [2021-02-19 17:48:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:14,609 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:14,609 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:14,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1715,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:14,810 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1096093315, now seen corresponding path program 230 times [2021-02-19 17:48:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:14,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290888703] [2021-02-19 17:48:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:15,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290888703] [2021-02-19 17:48:15,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426064295] [2021-02-19 17:48:15,064 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 [2021-02-19 17:48:15,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,485 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 [2021-02-19 17:48:15,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,497 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 15 treesize of output 11 [2021-02-19 17:48:15,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,509 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 [2021-02-19 17:48:15,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,519 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 17 treesize of output 13 [2021-02-19 17:48:15,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,648 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:15,649 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:15,649 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:15,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:15,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:15,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:15,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:15,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898396530] [2021-02-19 17:48:15,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:15,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:15,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:15,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:15,846 INFO L87 Difference]: Start difference. First operand 696 states and 1968 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) [2021-02-19 17:48:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:16,984 INFO L93 Difference]: Finished difference Result 868 states and 2281 transitions. [2021-02-19 17:48:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:48:16,985 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 [2021-02-19 17:48:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:16,986 INFO L225 Difference]: With dead ends: 868 [2021-02-19 17:48:16,986 INFO L226 Difference]: Without dead ends: 868 [2021-02-19 17:48:16,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-02-19 17:48:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 718. [2021-02-19 17:48:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.8535564853556483) internal successors, (2046), 717 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2046 transitions. [2021-02-19 17:48:16,993 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2046 transitions. Word has length 17 [2021-02-19 17:48:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:16,993 INFO L480 AbstractCegarLoop]: Abstraction has 718 states and 2046 transitions. [2021-02-19 17:48:16,993 INFO L481 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) [2021-02-19 17:48:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2046 transitions. [2021-02-19 17:48:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:16,993 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:16,994 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:17,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-02-19 17:48:17,194 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash -294477087, now seen corresponding path program 231 times [2021-02-19 17:48:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:17,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91394640] [2021-02-19 17:48:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91394640] [2021-02-19 17:48:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692997230] [2021-02-19 17:48:17,437 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 [2021-02-19 17:48:17,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:17,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:17,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:17,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,825 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 [2021-02-19 17:48:17,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,835 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 [2021-02-19 17:48:17,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,846 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 [2021-02-19 17:48:17,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,854 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 17 treesize of output 13 [2021-02-19 17:48:17,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,963 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:17,964 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:17,964 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:17,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:17,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142632305] [2021-02-19 17:48:18,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:18,202 INFO L87 Difference]: Start difference. First operand 718 states and 2046 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) [2021-02-19 17:48:19,565 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:48:19,820 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-02-19 17:48:20,043 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:48:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:20,786 INFO L93 Difference]: Finished difference Result 873 states and 2325 transitions. [2021-02-19 17:48:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:48:20,788 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 [2021-02-19 17:48:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:20,790 INFO L225 Difference]: With dead ends: 873 [2021-02-19 17:48:20,790 INFO L226 Difference]: Without dead ends: 864 [2021-02-19 17:48:20,790 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:48:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-02-19 17:48:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 727. [2021-02-19 17:48:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.8581267217630852) internal successors, (2075), 726 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2075 transitions. [2021-02-19 17:48:20,798 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2075 transitions. Word has length 17 [2021-02-19 17:48:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:20,798 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 2075 transitions. [2021-02-19 17:48:20,798 INFO L481 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) [2021-02-19 17:48:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2075 transitions. [2021-02-19 17:48:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:20,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:20,798 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:20,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1726,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:20,999 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1423866619, now seen corresponding path program 232 times [2021-02-19 17:48:20,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:20,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949573243] [2021-02-19 17:48:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:21,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949573243] [2021-02-19 17:48:21,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159303040] [2021-02-19 17:48:21,253 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 [2021-02-19 17:48:21,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:21,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:21,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,668 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 [2021-02-19 17:48:21,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,678 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 15 treesize of output 11 [2021-02-19 17:48:21,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,688 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 16 treesize of output 12 [2021-02-19 17:48:21,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,697 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 17 treesize of output 13 [2021-02-19 17:48:21,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,804 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:21,805 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:21,805 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:21,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:21,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:21,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:21,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864398711] [2021-02-19 17:48:21,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:21,968 INFO L87 Difference]: Start difference. First operand 727 states and 2075 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) [2021-02-19 17:48:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:23,610 INFO L93 Difference]: Finished difference Result 862 states and 2301 transitions. [2021-02-19 17:48:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:48:23,612 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 [2021-02-19 17:48:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:23,613 INFO L225 Difference]: With dead ends: 862 [2021-02-19 17:48:23,613 INFO L226 Difference]: Without dead ends: 862 [2021-02-19 17:48:23,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:48:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-02-19 17:48:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 717. [2021-02-19 17:48:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.8421787709497206) internal successors, (2035), 716 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2035 transitions. [2021-02-19 17:48:23,621 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2035 transitions. Word has length 17 [2021-02-19 17:48:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:23,621 INFO L480 AbstractCegarLoop]: Abstraction has 717 states and 2035 transitions. [2021-02-19 17:48:23,621 INFO L481 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) [2021-02-19 17:48:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2035 transitions. [2021-02-19 17:48:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:23,621 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:23,621 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:23,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-02-19 17:48:23,822 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash -286746689, now seen corresponding path program 233 times [2021-02-19 17:48:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:23,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422538141] [2021-02-19 17:48:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:24,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422538141] [2021-02-19 17:48:24,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633738214] [2021-02-19 17:48:24,078 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 [2021-02-19 17:48:24,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:48:24,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:24,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:24,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,580 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 [2021-02-19 17:48:24,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,649 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:48:24,650 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:24,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:48:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:24,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:24,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:24,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685884797] [2021-02-19 17:48:24,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:24,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:24,724 INFO L87 Difference]: Start difference. First operand 717 states and 2035 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) [2021-02-19 17:48:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:26,279 INFO L93 Difference]: Finished difference Result 827 states and 2230 transitions. [2021-02-19 17:48:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:48:26,281 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 [2021-02-19 17:48:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:26,282 INFO L225 Difference]: With dead ends: 827 [2021-02-19 17:48:26,282 INFO L226 Difference]: Without dead ends: 827 [2021-02-19 17:48:26,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:48:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-02-19 17:48:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 712. [2021-02-19 17:48:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.8354430379746836) internal successors, (2016), 711 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2016 transitions. [2021-02-19 17:48:26,290 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2016 transitions. Word has length 17 [2021-02-19 17:48:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:26,290 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 2016 transitions. [2021-02-19 17:48:26,290 INFO L481 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) [2021-02-19 17:48:26,291 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2016 transitions. [2021-02-19 17:48:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:26,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:26,291 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:26,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1735,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:26,492 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1776151685, now seen corresponding path program 234 times [2021-02-19 17:48:26,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:26,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820810992] [2021-02-19 17:48:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:26,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820810992] [2021-02-19 17:48:26,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443329924] [2021-02-19 17:48:26,709 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 [2021-02-19 17:48:26,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:26,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:27,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,172 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 [2021-02-19 17:48:27,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,182 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 16 treesize of output 12 [2021-02-19 17:48:27,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,249 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:48:27,249 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:27,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:48:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:27,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:27,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:27,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105966000] [2021-02-19 17:48:27,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:27,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:27,325 INFO L87 Difference]: Start difference. First operand 712 states and 2016 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) [2021-02-19 17:48:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:28,022 INFO L93 Difference]: Finished difference Result 779 states and 2134 transitions. [2021-02-19 17:48:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:48:28,024 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 [2021-02-19 17:48:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:28,025 INFO L225 Difference]: With dead ends: 779 [2021-02-19 17:48:28,025 INFO L226 Difference]: Without dead ends: 779 [2021-02-19 17:48:28,025 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-02-19 17:48:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 712. [2021-02-19 17:48:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.8354430379746836) internal successors, (2016), 711 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2016 transitions. [2021-02-19 17:48:28,032 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2016 transitions. Word has length 17 [2021-02-19 17:48:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:28,032 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 2016 transitions. [2021-02-19 17:48:28,032 INFO L481 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) [2021-02-19 17:48:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2016 transitions. [2021-02-19 17:48:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:28,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:28,033 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:28,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:28,233 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:28,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1799298463, now seen corresponding path program 235 times [2021-02-19 17:48:28,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:28,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25769730] [2021-02-19 17:48:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:48:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25769730] [2021-02-19 17:48:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886938649] [2021-02-19 17:48:28,490 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 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 [2021-02-19 17:48:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:28,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,895 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 [2021-02-19 17:48:28,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,905 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 [2021-02-19 17:48:28,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,915 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 [2021-02-19 17:48:28,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:48:28,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:29,035 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:29,036 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:29,036 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:29,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:29,038 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:29,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:29,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:29,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380032785] [2021-02-19 17:48:29,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:29,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:29,259 INFO L87 Difference]: Start difference. First operand 712 states and 2016 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) [2021-02-19 17:48:30,272 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-02-19 17:48:30,545 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:48:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:31,420 INFO L93 Difference]: Finished difference Result 849 states and 2271 transitions. [2021-02-19 17:48:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:48:31,422 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 [2021-02-19 17:48:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:31,424 INFO L225 Difference]: With dead ends: 849 [2021-02-19 17:48:31,424 INFO L226 Difference]: Without dead ends: 845 [2021-02-19 17:48:31,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:48:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-02-19 17:48:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 728. [2021-02-19 17:48:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.844566712517194) internal successors, (2068), 727 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2068 transitions. [2021-02-19 17:48:31,431 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2068 transitions. Word has length 17 [2021-02-19 17:48:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:31,431 INFO L480 AbstractCegarLoop]: Abstraction has 728 states and 2068 transitions. [2021-02-19 17:48:31,432 INFO L481 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) [2021-02-19 17:48:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2068 transitions. [2021-02-19 17:48:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:31,432 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:31,432 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:31,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-02-19 17:48:31,633 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash -766621499, now seen corresponding path program 236 times [2021-02-19 17:48:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:31,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418714273] [2021-02-19 17:48:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:48:31,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418714273] [2021-02-19 17:48:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181854110] [2021-02-19 17:48:31,811 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 [2021-02-19 17:48:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:32,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,329 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 [2021-02-19 17:48:32,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:32,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:32,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:32,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,373 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 17 treesize of output 13 [2021-02-19 17:48:32,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:32,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,500 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:48:32,501 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:48:32,501 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:32,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:48:32,504 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:48:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:32,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:32,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:32,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321380272] [2021-02-19 17:48:32,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:32,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:32,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:32,611 INFO L87 Difference]: Start difference. First operand 728 states and 2068 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) [2021-02-19 17:48:33,649 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:48:34,296 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:48:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:34,497 INFO L93 Difference]: Finished difference Result 807 states and 2185 transitions. [2021-02-19 17:48:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:48:34,500 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 [2021-02-19 17:48:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:34,501 INFO L225 Difference]: With dead ends: 807 [2021-02-19 17:48:34,501 INFO L226 Difference]: Without dead ends: 799 [2021-02-19 17:48:34,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:48:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-02-19 17:48:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 728. [2021-02-19 17:48:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.8363136176066024) internal successors, (2062), 727 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2062 transitions. [2021-02-19 17:48:34,508 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2062 transitions. Word has length 17 [2021-02-19 17:48:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:34,508 INFO L480 AbstractCegarLoop]: Abstraction has 728 states and 2062 transitions. [2021-02-19 17:48:34,508 INFO L481 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) [2021-02-19 17:48:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2062 transitions. [2021-02-19 17:48:34,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:34,509 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:34,509 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:34,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1747,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:34,714 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1294238303, now seen corresponding path program 237 times [2021-02-19 17:48:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:34,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901258630] [2021-02-19 17:48:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:48:34,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901258630] [2021-02-19 17:48:34,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609437911] [2021-02-19 17:48:34,881 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 [2021-02-19 17:48:34,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:35,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:35,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:35,453 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 [2021-02-19 17:48:35,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,463 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 [2021-02-19 17:48:35,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:35,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:35,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:35,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:35,497 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 17 treesize of output 13 [2021-02-19 17:48:35,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:48:35,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,625 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:48:35,626 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:48:35,626 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:35,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:48:35,629 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:48:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:35,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:35,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 17:48:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328677627] [2021-02-19 17:48:35,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:35,736 INFO L87 Difference]: Start difference. First operand 728 states and 2062 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) [2021-02-19 17:48:36,532 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:48:37,405 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 17:48:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:37,520 INFO L93 Difference]: Finished difference Result 793 states and 2154 transitions. [2021-02-19 17:48:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:48:37,521 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 [2021-02-19 17:48:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:37,522 INFO L225 Difference]: With dead ends: 793 [2021-02-19 17:48:37,522 INFO L226 Difference]: Without dead ends: 781 [2021-02-19 17:48:37,522 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:48:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-02-19 17:48:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 734. [2021-02-19 17:48:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.8226466575716236) internal successors, (2069), 733 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2069 transitions. [2021-02-19 17:48:37,534 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2069 transitions. Word has length 17 [2021-02-19 17:48:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:37,535 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2069 transitions. [2021-02-19 17:48:37,535 INFO L481 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) [2021-02-19 17:48:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2069 transitions. [2021-02-19 17:48:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:37,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:37,535 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:37,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1754,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:37,736 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash -902314311, now seen corresponding path program 238 times [2021-02-19 17:48:37,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:37,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076388199] [2021-02-19 17:48:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:38,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076388199] [2021-02-19 17:48:38,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978006648] [2021-02-19 17:48:38,053 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 [2021-02-19 17:48:38,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:38,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:38,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:48:38,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,538 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 [2021-02-19 17:48:38,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,549 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 [2021-02-19 17:48:38,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,558 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 17 treesize of output 13 [2021-02-19 17:48:38,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,670 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:38,671 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:38,671 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:38,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:38,673 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:38,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:38,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:48:38,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179968772] [2021-02-19 17:48:38,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:38,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:38,835 INFO L87 Difference]: Start difference. First operand 734 states and 2069 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) [2021-02-19 17:48:39,995 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-02-19 17:48:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:40,211 INFO L93 Difference]: Finished difference Result 889 states and 2343 transitions. [2021-02-19 17:48:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:40,214 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 [2021-02-19 17:48:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:40,215 INFO L225 Difference]: With dead ends: 889 [2021-02-19 17:48:40,215 INFO L226 Difference]: Without dead ends: 888 [2021-02-19 17:48:40,215 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-02-19 17:48:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 749. [2021-02-19 17:48:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.834224598930481) internal successors, (2120), 748 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) [2021-02-19 17:48:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2120 transitions. [2021-02-19 17:48:40,223 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2120 transitions. Word has length 17 [2021-02-19 17:48:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:40,223 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 2120 transitions. [2021-02-19 17:48:40,223 INFO L481 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) [2021-02-19 17:48:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2120 transitions. [2021-02-19 17:48:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:40,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:40,224 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:40,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-02-19 17:48:40,424 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -100698083, now seen corresponding path program 239 times [2021-02-19 17:48:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:40,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948216570] [2021-02-19 17:48:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:40,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948216570] [2021-02-19 17:48:40,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805574451] [2021-02-19 17:48:40,753 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 [2021-02-19 17:48:40,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:48:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:41,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,239 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 16 treesize of output 12 [2021-02-19 17:48:41,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,249 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 [2021-02-19 17:48:41,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:48:41,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,269 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 17 treesize of output 13 [2021-02-19 17:48:41,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,384 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:41,385 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:41,386 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:41,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:41,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:41,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:41,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:48:41,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275553739] [2021-02-19 17:48:41,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:41,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:41,598 INFO L87 Difference]: Start difference. First operand 749 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) [2021-02-19 17:48:42,421 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:48:42,913 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:48:43,309 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:48:43,576 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:48:43,871 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:48:44,328 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:48:44,931 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-02-19 17:48:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:45,279 INFO L93 Difference]: Finished difference Result 917 states and 2407 transitions. [2021-02-19 17:48:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:48:45,282 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 [2021-02-19 17:48:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:45,283 INFO L225 Difference]: With dead ends: 917 [2021-02-19 17:48:45,283 INFO L226 Difference]: Without dead ends: 907 [2021-02-19 17:48:45,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:48:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-02-19 17:48:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 765. [2021-02-19 17:48:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.844240837696335) internal successors, (2173), 764 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2173 transitions. [2021-02-19 17:48:45,293 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2173 transitions. Word has length 17 [2021-02-19 17:48:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:45,293 INFO L480 AbstractCegarLoop]: Abstraction has 765 states and 2173 transitions. [2021-02-19 17:48:45,293 INFO L481 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) [2021-02-19 17:48:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2173 transitions. [2021-02-19 17:48:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:45,294 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:45,294 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:45,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1765,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:45,497 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1617645623, now seen corresponding path program 240 times [2021-02-19 17:48:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:45,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194554567] [2021-02-19 17:48:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:45,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194554567] [2021-02-19 17:48:45,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780929366] [2021-02-19 17:48:45,819 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 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 [2021-02-19 17:48:45,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:46,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,296 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 16 treesize of output 12 [2021-02-19 17:48:46,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,307 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 15 treesize of output 11 [2021-02-19 17:48:46,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,317 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 16 treesize of output 12 [2021-02-19 17:48:46,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,327 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 17 treesize of output 13 [2021-02-19 17:48:46,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,435 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:48:46,435 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:48:46,436 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:46,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:46,437 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:48:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:46,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:46,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:48:46,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243436973] [2021-02-19 17:48:46,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:46,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:46,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:46,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:46,611 INFO L87 Difference]: Start difference. First operand 765 states and 2173 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) [2021-02-19 17:48:47,391 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 17:48:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:48,950 INFO L93 Difference]: Finished difference Result 896 states and 2363 transitions. [2021-02-19 17:48:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:48:48,951 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 [2021-02-19 17:48:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:48,952 INFO L225 Difference]: With dead ends: 896 [2021-02-19 17:48:48,952 INFO L226 Difference]: Without dead ends: 892 [2021-02-19 17:48:48,952 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:48:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-02-19 17:48:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 748. [2021-02-19 17:48:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.824631860776439) internal successors, (2110), 747 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) [2021-02-19 17:48:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2110 transitions. [2021-02-19 17:48:48,960 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2110 transitions. Word has length 17 [2021-02-19 17:48:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:48,960 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2110 transitions. [2021-02-19 17:48:48,960 INFO L481 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) [2021-02-19 17:48:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2110 transitions. [2021-02-19 17:48:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:48,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:48,961 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:49,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-02-19 17:48:49,161 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -92967685, now seen corresponding path program 241 times [2021-02-19 17:48:49,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:49,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930324973] [2021-02-19 17:48:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:49,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930324973] [2021-02-19 17:48:49,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992874934] [2021-02-19 17:48:49,424 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 [2021-02-19 17:48:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:50,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,008 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 [2021-02-19 17:48:50,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:50,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,092 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:48:50,093 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:50,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:48:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:50,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:50,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:48:50,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348626625] [2021-02-19 17:48:50,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:50,182 INFO L87 Difference]: Start difference. First operand 748 states and 2110 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) [2021-02-19 17:48:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:53,060 INFO L93 Difference]: Finished difference Result 933 states and 2424 transitions. [2021-02-19 17:48:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:48:53,061 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 [2021-02-19 17:48:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:53,063 INFO L225 Difference]: With dead ends: 933 [2021-02-19 17:48:53,063 INFO L226 Difference]: Without dead ends: 933 [2021-02-19 17:48:53,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:48:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-02-19 17:48:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 732. [2021-02-19 17:48:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.819425444596443) internal successors, (2061), 731 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2061 transitions. [2021-02-19 17:48:53,071 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2061 transitions. Word has length 17 [2021-02-19 17:48:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:53,071 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 2061 transitions. [2021-02-19 17:48:53,071 INFO L481 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) [2021-02-19 17:48:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2061 transitions. [2021-02-19 17:48:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:53,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:53,072 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:53,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:53,283 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1582372681, now seen corresponding path program 242 times [2021-02-19 17:48:53,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:53,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431311285] [2021-02-19 17:48:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:53,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431311285] [2021-02-19 17:48:53,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414618784] [2021-02-19 17:48:53,552 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 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 [2021-02-19 17:48:53,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:53,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:48:54,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,131 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 15 treesize of output 11 [2021-02-19 17:48:54,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:54,207 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:48:54,207 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:54,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:54,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:48:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:54,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:54,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:48:54,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684497225] [2021-02-19 17:48:54,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:54,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:54,297 INFO L87 Difference]: Start difference. First operand 732 states and 2061 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) [2021-02-19 17:48:56,233 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 17:48:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:57,775 INFO L93 Difference]: Finished difference Result 875 states and 2339 transitions. [2021-02-19 17:48:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:48:57,778 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 [2021-02-19 17:48:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:57,779 INFO L225 Difference]: With dead ends: 875 [2021-02-19 17:48:57,779 INFO L226 Difference]: Without dead ends: 875 [2021-02-19 17:48:57,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:48:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-02-19 17:48:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 726. [2021-02-19 17:48:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.823448275862069) internal successors, (2047), 725 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2047 transitions. [2021-02-19 17:48:57,788 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2047 transitions. Word has length 17 [2021-02-19 17:48:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:57,788 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2047 transitions. [2021-02-19 17:48:57,788 INFO L481 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) [2021-02-19 17:48:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2047 transitions. [2021-02-19 17:48:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:57,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:57,789 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:57,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1777 [2021-02-19 17:48:57,989 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -509287301, now seen corresponding path program 243 times [2021-02-19 17:48:57,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:57,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371216916] [2021-02-19 17:48:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:58,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371216916] [2021-02-19 17:48:58,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552671345] [2021-02-19 17:48:58,269 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 [2021-02-19 17:48:58,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:48:58,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,825 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 [2021-02-19 17:48:58,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,835 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 [2021-02-19 17:48:58,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,912 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:48:58,913 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:48:58,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:48:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:58,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:58,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:48:58,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008923390] [2021-02-19 17:48:58,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:58,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:58,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:58,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:58,996 INFO L87 Difference]: Start difference. First operand 726 states and 2047 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) [2021-02-19 17:48:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:59,808 INFO L93 Difference]: Finished difference Result 774 states and 2131 transitions. [2021-02-19 17:48:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:59,811 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 [2021-02-19 17:48:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:59,812 INFO L225 Difference]: With dead ends: 774 [2021-02-19 17:48:59,813 INFO L226 Difference]: Without dead ends: 774 [2021-02-19 17:48:59,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-02-19 17:48:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 726. [2021-02-19 17:48:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.823448275862069) internal successors, (2047), 725 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2047 transitions. [2021-02-19 17:48:59,820 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2047 transitions. Word has length 17 [2021-02-19 17:48:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:59,820 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2047 transitions. [2021-02-19 17:48:59,820 INFO L481 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) [2021-02-19 17:48:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2047 transitions. [2021-02-19 17:48:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:59,821 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:59,821 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:00,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1780,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:00,021 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash 879028059, now seen corresponding path program 244 times [2021-02-19 17:49:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:00,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030433387] [2021-02-19 17:49:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:00,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030433387] [2021-02-19 17:49:00,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432923562] [2021-02-19 17:49:00,279 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 [2021-02-19 17:49:00,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:00,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:00,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,562 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 [2021-02-19 17:49:00,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:00,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,628 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-02-19 17:49:00,628 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:00,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,631 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-02-19 17:49:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:00,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:00,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:49:00,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647104403] [2021-02-19 17:49:00,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:49:00,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:49:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:49:00,712 INFO L87 Difference]: Start difference. First operand 726 states and 2047 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) [2021-02-19 17:49:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:01,493 INFO L93 Difference]: Finished difference Result 952 states and 2626 transitions. [2021-02-19 17:49:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:49:01,496 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 [2021-02-19 17:49:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:01,497 INFO L225 Difference]: With dead ends: 952 [2021-02-19 17:49:01,497 INFO L226 Difference]: Without dead ends: 952 [2021-02-19 17:49:01,498 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-02-19 17:49:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 725. [2021-02-19 17:49:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.8259668508287294) internal successors, (2046), 724 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2046 transitions. [2021-02-19 17:49:01,505 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2046 transitions. Word has length 17 [2021-02-19 17:49:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:01,505 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 2046 transitions. [2021-02-19 17:49:01,505 INFO L481 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) [2021-02-19 17:49:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2046 transitions. [2021-02-19 17:49:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:01,506 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:01,506 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:01,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-02-19 17:49:01,706 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 744702595, now seen corresponding path program 245 times [2021-02-19 17:49:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:01,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547794895] [2021-02-19 17:49:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:01,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547794895] [2021-02-19 17:49:01,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015585889] [2021-02-19 17:49:01,992 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 [2021-02-19 17:49:02,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:49:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:02,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:02,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,468 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 [2021-02-19 17:49:02,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:49:02,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,488 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 [2021-02-19 17:49:02,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,497 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 [2021-02-19 17:49:02,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,506 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 16 treesize of output 12 [2021-02-19 17:49:02,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,605 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-02-19 17:49:02,606 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:02,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:02,608 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-02-19 17:49:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:02,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:02,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:49:02,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043941296] [2021-02-19 17:49:02,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:49:02,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:02,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:49:02,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:49:02,722 INFO L87 Difference]: Start difference. First operand 725 states and 2046 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) [2021-02-19 17:49:03,641 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:49:03,952 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-02-19 17:49:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:03,969 INFO L93 Difference]: Finished difference Result 948 states and 2613 transitions. [2021-02-19 17:49:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:03,972 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 [2021-02-19 17:49:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:03,973 INFO L225 Difference]: With dead ends: 948 [2021-02-19 17:49:03,973 INFO L226 Difference]: Without dead ends: 943 [2021-02-19 17:49:03,974 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-02-19 17:49:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 725. [2021-02-19 17:49:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.824585635359116) internal successors, (2045), 724 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2045 transitions. [2021-02-19 17:49:03,982 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2045 transitions. Word has length 17 [2021-02-19 17:49:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:03,982 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 2045 transitions. [2021-02-19 17:49:03,982 INFO L481 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) [2021-02-19 17:49:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2045 transitions. [2021-02-19 17:49:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:03,983 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:03,983 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:04,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-02-19 17:49:04,184 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:04,184 INFO L82 PathProgramCache]: Analyzing trace with hash -773925315, now seen corresponding path program 246 times [2021-02-19 17:49:04,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:04,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899625212] [2021-02-19 17:49:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:04,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899625212] [2021-02-19 17:49:04,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655554840] [2021-02-19 17:49:04,499 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 [2021-02-19 17:49:04,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:49:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:04,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:04,999 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 15 treesize of output 11 [2021-02-19 17:49:05,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:49:05,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,055 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:49:05,055 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:05,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:49:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:05,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:05,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:05,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541023612] [2021-02-19 17:49:05,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:05,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:05,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:05,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:05,105 INFO L87 Difference]: Start difference. First operand 725 states and 2045 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) [2021-02-19 17:49:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:05,942 INFO L93 Difference]: Finished difference Result 953 states and 2628 transitions. [2021-02-19 17:49:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:49:05,945 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 [2021-02-19 17:49:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:05,947 INFO L225 Difference]: With dead ends: 953 [2021-02-19 17:49:05,947 INFO L226 Difference]: Without dead ends: 953 [2021-02-19 17:49:05,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-02-19 17:49:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 726. [2021-02-19 17:49:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.8248275862068963) internal successors, (2048), 725 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2048 transitions. [2021-02-19 17:49:05,954 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2048 transitions. Word has length 17 [2021-02-19 17:49:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:05,954 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2048 transitions. [2021-02-19 17:49:05,955 INFO L481 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) [2021-02-19 17:49:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2048 transitions. [2021-02-19 17:49:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:05,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:05,955 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:06,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1792 [2021-02-19 17:49:06,156 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash 156957273, now seen corresponding path program 247 times [2021-02-19 17:49:06,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:06,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455976814] [2021-02-19 17:49:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455976814] [2021-02-19 17:49:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913965977] [2021-02-19 17:49:06,453 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 [2021-02-19 17:49:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:07,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,112 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 16 treesize of output 12 [2021-02-19 17:49:07,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:07,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:07,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,143 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 [2021-02-19 17:49:07,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,153 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 7 treesize of output 5 [2021-02-19 17:49:07,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,164 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 17 treesize of output 13 [2021-02-19 17:49:07,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,286 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:49:07,286 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:49:07,287 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:07,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:07,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:49:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:07,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:07,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:07,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468097135] [2021-02-19 17:49:07,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:07,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:07,372 INFO L87 Difference]: Start difference. First operand 726 states and 2048 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) [2021-02-19 17:49:07,950 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:49:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:08,734 INFO L93 Difference]: Finished difference Result 948 states and 2614 transitions. [2021-02-19 17:49:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:08,737 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 [2021-02-19 17:49:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:08,739 INFO L225 Difference]: With dead ends: 948 [2021-02-19 17:49:08,739 INFO L226 Difference]: Without dead ends: 944 [2021-02-19 17:49:08,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-02-19 17:49:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 726. [2021-02-19 17:49:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.823448275862069) internal successors, (2047), 725 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2047 transitions. [2021-02-19 17:49:08,746 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2047 transitions. Word has length 17 [2021-02-19 17:49:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:08,746 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2047 transitions. [2021-02-19 17:49:08,747 INFO L481 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) [2021-02-19 17:49:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2047 transitions. [2021-02-19 17:49:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:08,747 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:08,747 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:08,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-02-19 17:49:08,948 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:08,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1934947429, now seen corresponding path program 248 times [2021-02-19 17:49:08,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:08,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024646628] [2021-02-19 17:49:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:09,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024646628] [2021-02-19 17:49:09,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227559273] [2021-02-19 17:49:09,263 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 [2021-02-19 17:49:09,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:09,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:09,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,834 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 16 treesize of output 12 [2021-02-19 17:49:09,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:09,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,923 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:49:09,923 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:09,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:49:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:10,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:10,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118050249] [2021-02-19 17:49:10,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:10,011 INFO L87 Difference]: Start difference. First operand 726 states and 2047 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) [2021-02-19 17:49:11,320 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:49:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:11,793 INFO L93 Difference]: Finished difference Result 978 states and 2678 transitions. [2021-02-19 17:49:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:49:11,796 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 [2021-02-19 17:49:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:11,798 INFO L225 Difference]: With dead ends: 978 [2021-02-19 17:49:11,798 INFO L226 Difference]: Without dead ends: 978 [2021-02-19 17:49:11,798 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:49:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-02-19 17:49:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 729. [2021-02-19 17:49:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.8241758241758244) internal successors, (2056), 728 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2056 transitions. [2021-02-19 17:49:11,806 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2056 transitions. Word has length 17 [2021-02-19 17:49:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:11,806 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2056 transitions. [2021-02-19 17:49:11,806 INFO L481 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) [2021-02-19 17:49:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2056 transitions. [2021-02-19 17:49:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:11,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:11,807 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:12,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1802,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:12,007 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash -380898305, now seen corresponding path program 249 times [2021-02-19 17:49:12,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:12,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744260231] [2021-02-19 17:49:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:12,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744260231] [2021-02-19 17:49:12,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833192282] [2021-02-19 17:49:12,319 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 [2021-02-19 17:49:12,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:49:12,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:12,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:12,994 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 16 treesize of output 12 [2021-02-19 17:49:12,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,004 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 [2021-02-19 17:49:13,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,016 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 [2021-02-19 17:49:13,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,028 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 7 treesize of output 5 [2021-02-19 17:49:13,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:13,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,051 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 17 treesize of output 13 [2021-02-19 17:49:13,055 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,195 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:49:13,196 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:49:13,196 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:13,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:13,199 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:49:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:13,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:13,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:13,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531809229] [2021-02-19 17:49:13,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:13,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:13,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:13,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:13,323 INFO L87 Difference]: Start difference. First operand 729 states and 2056 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) [2021-02-19 17:49:14,018 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:49:14,302 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-19 17:49:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:14,766 INFO L93 Difference]: Finished difference Result 955 states and 2626 transitions. [2021-02-19 17:49:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:49:14,767 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 [2021-02-19 17:49:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:14,768 INFO L225 Difference]: With dead ends: 955 [2021-02-19 17:49:14,768 INFO L226 Difference]: Without dead ends: 952 [2021-02-19 17:49:14,769 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-02-19 17:49:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 729. [2021-02-19 17:49:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.822802197802198) internal successors, (2055), 728 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2055 transitions. [2021-02-19 17:49:14,776 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2055 transitions. Word has length 17 [2021-02-19 17:49:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:14,776 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2055 transitions. [2021-02-19 17:49:14,776 INFO L481 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) [2021-02-19 17:49:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2055 transitions. [2021-02-19 17:49:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:14,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:14,777 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:14,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1805,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:14,977 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1695305091, now seen corresponding path program 250 times [2021-02-19 17:49:14,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:14,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552008080] [2021-02-19 17:49:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:15,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552008080] [2021-02-19 17:49:15,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22975905] [2021-02-19 17:49:15,346 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 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 [2021-02-19 17:49:15,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:15,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:49:15,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,960 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 15 treesize of output 11 [2021-02-19 17:49:15,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:16,049 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:49:16,049 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:16,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:16,052 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:49:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:16,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:16,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214029645] [2021-02-19 17:49:16,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:16,144 INFO L87 Difference]: Start difference. First operand 729 states and 2055 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) [2021-02-19 17:49:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:18,494 INFO L93 Difference]: Finished difference Result 1049 states and 2800 transitions. [2021-02-19 17:49:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:49:18,497 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 [2021-02-19 17:49:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:18,498 INFO L225 Difference]: With dead ends: 1049 [2021-02-19 17:49:18,498 INFO L226 Difference]: Without dead ends: 1049 [2021-02-19 17:49:18,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:49:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-02-19 17:49:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 740. [2021-02-19 17:49:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.832205683355886) internal successors, (2093), 739 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2093 transitions. [2021-02-19 17:49:18,507 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2093 transitions. Word has length 17 [2021-02-19 17:49:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:18,507 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 2093 transitions. [2021-02-19 17:49:18,507 INFO L481 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) [2021-02-19 17:49:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2093 transitions. [2021-02-19 17:49:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:18,507 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:18,507 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:18,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1812,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:18,708 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:18,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1679961497, now seen corresponding path program 251 times [2021-02-19 17:49:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:18,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505256100] [2021-02-19 17:49:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505256100] [2021-02-19 17:49:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247479895] [2021-02-19 17:49:19,079 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 [2021-02-19 17:49:19,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:49:19,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,610 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 [2021-02-19 17:49:19,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:19,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,632 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 [2021-02-19 17:49:19,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:19,648 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:19,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,667 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 17 treesize of output 13 [2021-02-19 17:49:19,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,795 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:49:19,796 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:49:19,797 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:19,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:19,800 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:49:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:19,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:19,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:19,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412279005] [2021-02-19 17:49:19,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:19,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:19,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:19,927 INFO L87 Difference]: Start difference. First operand 740 states and 2093 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) [2021-02-19 17:49:20,812 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:49:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:21,795 INFO L93 Difference]: Finished difference Result 1002 states and 2710 transitions. [2021-02-19 17:49:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:49:21,798 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 [2021-02-19 17:49:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:21,799 INFO L225 Difference]: With dead ends: 1002 [2021-02-19 17:49:21,799 INFO L226 Difference]: Without dead ends: 1000 [2021-02-19 17:49:21,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-02-19 17:49:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 740. [2021-02-19 17:49:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.83085250338295) internal successors, (2092), 739 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2092 transitions. [2021-02-19 17:49:21,808 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2092 transitions. Word has length 17 [2021-02-19 17:49:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:21,808 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 2092 transitions. [2021-02-19 17:49:21,808 INFO L481 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) [2021-02-19 17:49:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2092 transitions. [2021-02-19 17:49:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:21,808 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:21,808 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:22,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:22,009 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1687574693, now seen corresponding path program 252 times [2021-02-19 17:49:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:22,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519864219] [2021-02-19 17:49:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519864219] [2021-02-19 17:49:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17492590] [2021-02-19 17:49:22,422 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 [2021-02-19 17:49:22,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:49:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:22,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:49:22,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,941 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 17 treesize of output 13 [2021-02-19 17:49:22,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,955 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 [2021-02-19 17:49:22,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,966 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 [2021-02-19 17:49:22,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:23,101 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:49:23,102 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:49:23,102 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:23,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:23,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:49:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:23,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:23,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:23,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264412595] [2021-02-19 17:49:23,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:23,316 INFO L87 Difference]: Start difference. First operand 740 states and 2092 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) [2021-02-19 17:49:24,247 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:49:24,430 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 17:49:25,003 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-02-19 17:49:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:25,943 INFO L93 Difference]: Finished difference Result 1059 states and 2811 transitions. [2021-02-19 17:49:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:49:25,946 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 [2021-02-19 17:49:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:25,948 INFO L225 Difference]: With dead ends: 1059 [2021-02-19 17:49:25,948 INFO L226 Difference]: Without dead ends: 1059 [2021-02-19 17:49:25,948 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:49:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-02-19 17:49:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 748. [2021-02-19 17:49:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.8393574297188753) internal successors, (2121), 747 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2121 transitions. [2021-02-19 17:49:25,957 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2121 transitions. Word has length 17 [2021-02-19 17:49:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:25,957 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2121 transitions. [2021-02-19 17:49:25,957 INFO L481 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) [2021-02-19 17:49:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2121 transitions. [2021-02-19 17:49:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:25,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:25,958 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:26,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1822 [2021-02-19 17:49:26,161 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash -885958465, now seen corresponding path program 253 times [2021-02-19 17:49:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:26,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045291168] [2021-02-19 17:49:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045291168] [2021-02-19 17:49:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791869904] [2021-02-19 17:49:26,578 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 [2021-02-19 17:49:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,026 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 [2021-02-19 17:49:27,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,034 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 17 treesize of output 13 [2021-02-19 17:49:27,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,042 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 [2021-02-19 17:49:27,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:27,050 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 [2021-02-19 17:49:27,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,133 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:49:27,134 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:27,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:27,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:49:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:27,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:27,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:27,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931158013] [2021-02-19 17:49:27,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:27,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:27,426 INFO L87 Difference]: Start difference. First operand 748 states and 2121 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) [2021-02-19 17:49:28,281 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-02-19 17:49:28,753 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 17:49:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:29,955 INFO L93 Difference]: Finished difference Result 1038 states and 2781 transitions. [2021-02-19 17:49:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:49:29,958 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 [2021-02-19 17:49:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:29,960 INFO L225 Difference]: With dead ends: 1038 [2021-02-19 17:49:29,960 INFO L226 Difference]: Without dead ends: 1035 [2021-02-19 17:49:29,960 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:49:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-02-19 17:49:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 748. [2021-02-19 17:49:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.8366800535475236) internal successors, (2119), 747 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) [2021-02-19 17:49:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2119 transitions. [2021-02-19 17:49:29,968 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2119 transitions. Word has length 17 [2021-02-19 17:49:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:29,968 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2119 transitions. [2021-02-19 17:49:29,968 INFO L481 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) [2021-02-19 17:49:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2119 transitions. [2021-02-19 17:49:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:29,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:29,969 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:30,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:30,170 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash 832385241, now seen corresponding path program 254 times [2021-02-19 17:49:30,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:30,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440265780] [2021-02-19 17:49:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:30,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440265780] [2021-02-19 17:49:30,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505874701] [2021-02-19 17:49:30,609 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 [2021-02-19 17:49:30,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:30,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,130 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 [2021-02-19 17:49:31,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,143 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 17 treesize of output 13 [2021-02-19 17:49:31,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,158 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 [2021-02-19 17:49:31,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,170 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 15 treesize of output 11 [2021-02-19 17:49:31,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,316 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:49:31,317 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:49:31,318 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:31,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:31,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:49:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:31,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:31,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:31,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790153397] [2021-02-19 17:49:31,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:31,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:31,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:31,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:31,545 INFO L87 Difference]: Start difference. First operand 748 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) [2021-02-19 17:49:32,308 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-02-19 17:49:32,544 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-02-19 17:49:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:32,858 INFO L93 Difference]: Finished difference Result 1022 states and 2759 transitions. [2021-02-19 17:49:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:32,861 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 [2021-02-19 17:49:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:32,862 INFO L225 Difference]: With dead ends: 1022 [2021-02-19 17:49:32,862 INFO L226 Difference]: Without dead ends: 1022 [2021-02-19 17:49:32,863 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-02-19 17:49:32,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 747. [2021-02-19 17:49:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.8351206434316354) internal successors, (2115), 746 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2115 transitions. [2021-02-19 17:49:32,870 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2115 transitions. Word has length 17 [2021-02-19 17:49:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:32,871 INFO L480 AbstractCegarLoop]: Abstraction has 747 states and 2115 transitions. [2021-02-19 17:49:32,871 INFO L481 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) [2021-02-19 17:49:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2115 transitions. [2021-02-19 17:49:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:32,871 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:32,871 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:33,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1832 [2021-02-19 17:49:33,072 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash 111872965, now seen corresponding path program 255 times [2021-02-19 17:49:33,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:33,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168956415] [2021-02-19 17:49:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:33,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168956415] [2021-02-19 17:49:33,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68992419] [2021-02-19 17:49:33,387 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 [2021-02-19 17:49:33,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:49:33,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:33,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:49:33,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,773 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 15 treesize of output 11 [2021-02-19 17:49:33,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,864 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:49:33,864 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:33,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,867 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:49:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:33,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:33,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034453448] [2021-02-19 17:49:33,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:33,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:33,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:33,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:33,949 INFO L87 Difference]: Start difference. First operand 747 states and 2115 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) [2021-02-19 17:49:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:35,024 INFO L93 Difference]: Finished difference Result 883 states and 2396 transitions. [2021-02-19 17:49:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:35,026 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 [2021-02-19 17:49:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:35,027 INFO L225 Difference]: With dead ends: 883 [2021-02-19 17:49:35,028 INFO L226 Difference]: Without dead ends: 883 [2021-02-19 17:49:35,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-02-19 17:49:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 764. [2021-02-19 17:49:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.833551769331586) internal successors, (2162), 763 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) [2021-02-19 17:49:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2162 transitions. [2021-02-19 17:49:35,036 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2162 transitions. Word has length 17 [2021-02-19 17:49:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:35,036 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2162 transitions. [2021-02-19 17:49:35,036 INFO L481 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) [2021-02-19 17:49:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2162 transitions. [2021-02-19 17:49:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:35,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:35,036 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:35,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1836,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:35,237 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1042755553, now seen corresponding path program 256 times [2021-02-19 17:49:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:35,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407017029] [2021-02-19 17:49:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407017029] [2021-02-19 17:49:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637715866] [2021-02-19 17:49:35,541 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 [2021-02-19 17:49:35,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:35,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:36,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,054 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 [2021-02-19 17:49:36,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:36,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:36,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,091 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 [2021-02-19 17:49:36,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,103 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 [2021-02-19 17:49:36,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,115 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 17 treesize of output 13 [2021-02-19 17:49:36,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,260 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:49:36,261 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:49:36,261 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:36,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:36,263 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:49:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:36,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:36,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:36,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321129531] [2021-02-19 17:49:36,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:36,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:36,388 INFO L87 Difference]: Start difference. First operand 764 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) [2021-02-19 17:49:37,058 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:49:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:38,344 INFO L93 Difference]: Finished difference Result 867 states and 2359 transitions. [2021-02-19 17:49:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:49:38,347 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 [2021-02-19 17:49:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:38,348 INFO L225 Difference]: With dead ends: 867 [2021-02-19 17:49:38,348 INFO L226 Difference]: Without dead ends: 863 [2021-02-19 17:49:38,349 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:49:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-02-19 17:49:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 769. [2021-02-19 17:49:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.8229166666666665) internal successors, (2168), 768 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2168 transitions. [2021-02-19 17:49:38,356 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2168 transitions. Word has length 17 [2021-02-19 17:49:38,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:38,356 INFO L480 AbstractCegarLoop]: Abstraction has 769 states and 2168 transitions. [2021-02-19 17:49:38,356 INFO L481 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) [2021-02-19 17:49:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2168 transitions. [2021-02-19 17:49:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:38,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:38,357 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:38,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:38,558 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1049149149, now seen corresponding path program 257 times [2021-02-19 17:49:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:38,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230170406] [2021-02-19 17:49:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230170406] [2021-02-19 17:49:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351185479] [2021-02-19 17:49:38,883 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 [2021-02-19 17:49:38,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:49:38,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:39,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,348 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 [2021-02-19 17:49:39,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,355 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 [2021-02-19 17:49:39,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,414 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:49:39,414 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:39,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:49:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:39,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:39,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:39,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652019066] [2021-02-19 17:49:39,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:39,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:39,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:39,504 INFO L87 Difference]: Start difference. First operand 769 states and 2168 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) [2021-02-19 17:49:40,667 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:49:40,998 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:49:41,580 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 17:49:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:41,674 INFO L93 Difference]: Finished difference Result 856 states and 2352 transitions. [2021-02-19 17:49:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:49:41,677 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 [2021-02-19 17:49:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:41,678 INFO L225 Difference]: With dead ends: 856 [2021-02-19 17:49:41,678 INFO L226 Difference]: Without dead ends: 856 [2021-02-19 17:49:41,678 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:49:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-02-19 17:49:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 751. [2021-02-19 17:49:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.8346666666666667) internal successors, (2126), 750 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2126 transitions. [2021-02-19 17:49:41,685 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2126 transitions. Word has length 17 [2021-02-19 17:49:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:41,685 INFO L480 AbstractCegarLoop]: Abstraction has 751 states and 2126 transitions. [2021-02-19 17:49:41,685 INFO L481 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) [2021-02-19 17:49:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2126 transitions. [2021-02-19 17:49:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:41,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:41,686 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:41,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:41,887 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash 504899975, now seen corresponding path program 258 times [2021-02-19 17:49:41,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:41,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482609443] [2021-02-19 17:49:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:42,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482609443] [2021-02-19 17:49:42,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426449282] [2021-02-19 17:49:42,195 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 [2021-02-19 17:49:42,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:49:42,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:42,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,846 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 [2021-02-19 17:49:42,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,857 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 [2021-02-19 17:49:42,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:42,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:42,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,895 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 [2021-02-19 17:49:42,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,908 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 17 treesize of output 13 [2021-02-19 17:49:42,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:43,062 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:49:43,064 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:49:43,064 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:43,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:43,068 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:49:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:43,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:43,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:43,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369187290] [2021-02-19 17:49:43,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:43,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:43,203 INFO L87 Difference]: Start difference. First operand 751 states and 2126 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) [2021-02-19 17:49:43,906 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:49:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:44,374 INFO L93 Difference]: Finished difference Result 826 states and 2293 transitions. [2021-02-19 17:49:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:49:44,378 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 [2021-02-19 17:49:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:44,379 INFO L225 Difference]: With dead ends: 826 [2021-02-19 17:49:44,379 INFO L226 Difference]: Without dead ends: 823 [2021-02-19 17:49:44,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:49:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-02-19 17:49:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 753. [2021-02-19 17:49:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.833776595744681) internal successors, (2131), 752 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2131 transitions. [2021-02-19 17:49:44,387 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2131 transitions. Word has length 17 [2021-02-19 17:49:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:44,387 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2131 transitions. [2021-02-19 17:49:44,387 INFO L481 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) [2021-02-19 17:49:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2131 transitions. [2021-02-19 17:49:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:44,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:44,388 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:44,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:44,588 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash -809506811, now seen corresponding path program 259 times [2021-02-19 17:49:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364121550] [2021-02-19 17:49:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:44,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364121550] [2021-02-19 17:49:44,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832047822] [2021-02-19 17:49:44,919 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 [2021-02-19 17:49:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:45,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:45,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:45,518 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 16 treesize of output 12 [2021-02-19 17:49:45,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:45,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:45,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:45,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:45,617 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:49:45,617 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:45,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:45,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:49:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:45,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:45,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:45,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594859178] [2021-02-19 17:49:45,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:45,719 INFO L87 Difference]: Start difference. First operand 753 states and 2131 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) [2021-02-19 17:49:47,016 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:49:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:48,179 INFO L93 Difference]: Finished difference Result 920 states and 2467 transitions. [2021-02-19 17:49:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:49:48,181 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 [2021-02-19 17:49:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:48,182 INFO L225 Difference]: With dead ends: 920 [2021-02-19 17:49:48,182 INFO L226 Difference]: Without dead ends: 920 [2021-02-19 17:49:48,182 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:49:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-02-19 17:49:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 764. [2021-02-19 17:49:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.842726081258191) internal successors, (2169), 763 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2169 transitions. [2021-02-19 17:49:48,190 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2169 transitions. Word has length 17 [2021-02-19 17:49:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:48,190 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2169 transitions. [2021-02-19 17:49:48,190 INFO L481 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) [2021-02-19 17:49:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2169 transitions. [2021-02-19 17:49:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:48,190 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:48,190 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:48,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1856 [2021-02-19 17:49:48,391 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1729207519, now seen corresponding path program 260 times [2021-02-19 17:49:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:48,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732459698] [2021-02-19 17:49:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:48,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732459698] [2021-02-19 17:49:48,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398268119] [2021-02-19 17:49:48,787 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 [2021-02-19 17:49:48,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:48,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:48,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:49,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:49,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:49,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:49:49,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,463 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 [2021-02-19 17:49:49,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,477 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 8 treesize of output 6 [2021-02-19 17:49:49,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:49,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:49:49,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:49,515 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 [2021-02-19 17:49:49,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,671 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:49:49,672 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:49:49,673 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:49,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:49:49,676 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:49:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:49,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:49,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:49,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643877769] [2021-02-19 17:49:49,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:49,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:49,801 INFO L87 Difference]: Start difference. First operand 764 states and 2169 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) [2021-02-19 17:49:50,830 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:49:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:51,669 INFO L93 Difference]: Finished difference Result 873 states and 2377 transitions. [2021-02-19 17:49:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:49:51,673 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 [2021-02-19 17:49:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:51,674 INFO L225 Difference]: With dead ends: 873 [2021-02-19 17:49:51,674 INFO L226 Difference]: Without dead ends: 871 [2021-02-19 17:49:51,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-02-19 17:49:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 764. [2021-02-19 17:49:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.8414154652686765) internal successors, (2168), 763 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2168 transitions. [2021-02-19 17:49:51,682 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2168 transitions. Word has length 17 [2021-02-19 17:49:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:51,682 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2168 transitions. [2021-02-19 17:49:51,682 INFO L481 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) [2021-02-19 17:49:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2168 transitions. [2021-02-19 17:49:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:51,683 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:51,683 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:51,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:51,887 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -801776413, now seen corresponding path program 261 times [2021-02-19 17:49:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:51,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269352641] [2021-02-19 17:49:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:52,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269352641] [2021-02-19 17:49:52,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099733640] [2021-02-19 17:49:52,355 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 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 [2021-02-19 17:49:52,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:52,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,913 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 [2021-02-19 17:49:52,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:52,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,947 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 [2021-02-19 17:49:52,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,961 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 15 treesize of output 11 [2021-02-19 17:49:52,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:53,108 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:49:53,109 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:49:53,109 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:53,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:53,112 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:49:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:53,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:53,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:53,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563689584] [2021-02-19 17:49:53,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:53,332 INFO L87 Difference]: Start difference. First operand 764 states and 2168 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) [2021-02-19 17:49:54,789 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 17:49:55,251 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-02-19 17:49:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:55,561 INFO L93 Difference]: Finished difference Result 930 states and 2478 transitions. [2021-02-19 17:49:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:49:55,564 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 [2021-02-19 17:49:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:55,572 INFO L225 Difference]: With dead ends: 930 [2021-02-19 17:49:55,572 INFO L226 Difference]: Without dead ends: 930 [2021-02-19 17:49:55,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-02-19 17:49:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 772. [2021-02-19 17:49:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.8495460440985734) internal successors, (2197), 771 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2197 transitions. [2021-02-19 17:49:55,580 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2197 transitions. Word has length 17 [2021-02-19 17:49:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:55,580 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2197 transitions. [2021-02-19 17:49:55,580 INFO L481 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) [2021-02-19 17:49:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2197 transitions. [2021-02-19 17:49:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:55,581 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:55,581 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:55,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-02-19 17:49:55,782 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash -160185, now seen corresponding path program 262 times [2021-02-19 17:49:55,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:55,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341407048] [2021-02-19 17:49:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:56,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341407048] [2021-02-19 17:49:56,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670271742] [2021-02-19 17:49:56,172 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 [2021-02-19 17:49:56,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:56,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:56,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,549 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 [2021-02-19 17:49:56,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,561 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 17 treesize of output 13 [2021-02-19 17:49:56,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:56,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,575 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 [2021-02-19 17:49:56,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:56,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:56,586 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 [2021-02-19 17:49:56,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:56,718 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:49:56,719 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:49:56,719 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:56,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:56,720 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:49:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:56,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:56,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:56,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123807591] [2021-02-19 17:49:56,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:56,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:56,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:56,982 INFO L87 Difference]: Start difference. First operand 772 states and 2197 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) [2021-02-19 17:49:58,155 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-02-19 17:49:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:59,096 INFO L93 Difference]: Finished difference Result 900 states and 2434 transitions. [2021-02-19 17:49:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:49:59,098 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 [2021-02-19 17:49:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:59,100 INFO L225 Difference]: With dead ends: 900 [2021-02-19 17:49:59,100 INFO L226 Difference]: Without dead ends: 897 [2021-02-19 17:49:59,100 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:49:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-02-19 17:49:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 772. [2021-02-19 17:49:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.846952010376135) internal successors, (2195), 771 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2195 transitions. [2021-02-19 17:49:59,108 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2195 transitions. Word has length 17 [2021-02-19 17:49:59,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:59,108 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2195 transitions. [2021-02-19 17:49:59,108 INFO L481 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) [2021-02-19 17:49:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2195 transitions. [2021-02-19 17:49:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:59,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:59,109 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:59,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1870 [2021-02-19 17:49:59,309 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1718183521, now seen corresponding path program 263 times [2021-02-19 17:49:59,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:59,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113835428] [2021-02-19 17:49:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:59,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113835428] [2021-02-19 17:49:59,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078714731] [2021-02-19 17:49:59,747 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 [2021-02-19 17:49:59,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:49:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:00,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,252 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 [2021-02-19 17:50:00,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,265 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 [2021-02-19 17:50:00,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,280 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 16 treesize of output 12 [2021-02-19 17:50:00,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,292 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 15 treesize of output 11 [2021-02-19 17:50:00,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,450 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:00,451 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:50:00,451 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:00,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:00,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:50:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:00,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:00,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14160704] [2021-02-19 17:50:00,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:00,694 INFO L87 Difference]: Start difference. First operand 772 states and 2195 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) [2021-02-19 17:50:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:01,839 INFO L93 Difference]: Finished difference Result 893 states and 2426 transitions. [2021-02-19 17:50:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:01,843 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 [2021-02-19 17:50:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:01,844 INFO L225 Difference]: With dead ends: 893 [2021-02-19 17:50:01,844 INFO L226 Difference]: Without dead ends: 893 [2021-02-19 17:50:01,845 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-02-19 17:50:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 753. [2021-02-19 17:50:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.833776595744681) internal successors, (2131), 752 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2131 transitions. [2021-02-19 17:50:01,854 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2131 transitions. Word has length 17 [2021-02-19 17:50:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:01,855 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2131 transitions. [2021-02-19 17:50:01,855 INFO L481 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) [2021-02-19 17:50:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2131 transitions. [2021-02-19 17:50:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:01,855 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:01,855 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:02,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-02-19 17:50:02,056 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2143240737, now seen corresponding path program 264 times [2021-02-19 17:50:02,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:02,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104041215] [2021-02-19 17:50:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:02,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104041215] [2021-02-19 17:50:02,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620000840] [2021-02-19 17:50:02,399 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 [2021-02-19 17:50:02,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:02,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,961 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 [2021-02-19 17:50:02,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,973 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 15 treesize of output 11 [2021-02-19 17:50:02,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,071 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:50:03,071 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:03,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,074 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:50:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:03,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:03,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822463321] [2021-02-19 17:50:03,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:03,174 INFO L87 Difference]: Start difference. First operand 753 states and 2131 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) [2021-02-19 17:50:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:04,607 INFO L93 Difference]: Finished difference Result 858 states and 2357 transitions. [2021-02-19 17:50:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:50:04,610 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 [2021-02-19 17:50:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:04,611 INFO L225 Difference]: With dead ends: 858 [2021-02-19 17:50:04,611 INFO L226 Difference]: Without dead ends: 858 [2021-02-19 17:50:04,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-02-19 17:50:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 748. [2021-02-19 17:50:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.8326639892904955) internal successors, (2116), 747 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2116 transitions. [2021-02-19 17:50:04,619 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2116 transitions. Word has length 17 [2021-02-19 17:50:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:04,619 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2116 transitions. [2021-02-19 17:50:04,619 INFO L481 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) [2021-02-19 17:50:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2116 transitions. [2021-02-19 17:50:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:04,619 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:04,620 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:04,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1880 [2021-02-19 17:50:04,820 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash -589191613, now seen corresponding path program 265 times [2021-02-19 17:50:04,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:04,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458917444] [2021-02-19 17:50:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458917444] [2021-02-19 17:50:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221560069] [2021-02-19 17:50:05,077 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 [2021-02-19 17:50:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,734 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 16 treesize of output 12 [2021-02-19 17:50:05,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:05,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,760 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 [2021-02-19 17:50:05,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,773 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 7 treesize of output 5 [2021-02-19 17:50:05,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:05,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,799 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 [2021-02-19 17:50:05,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,969 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:50:05,970 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:50:05,971 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:05,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:50:05,975 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:50:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:06,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:06,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132497801] [2021-02-19 17:50:06,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:06,126 INFO L87 Difference]: Start difference. First operand 748 states and 2116 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) [2021-02-19 17:50:07,094 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:50:07,741 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:50:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:07,941 INFO L93 Difference]: Finished difference Result 823 states and 2278 transitions. [2021-02-19 17:50:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:50:07,944 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 [2021-02-19 17:50:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:07,945 INFO L225 Difference]: With dead ends: 823 [2021-02-19 17:50:07,945 INFO L226 Difference]: Without dead ends: 817 [2021-02-19 17:50:07,946 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:50:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-02-19 17:50:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 748. [2021-02-19 17:50:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.8286479250334673) internal successors, (2113), 747 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2113 transitions. [2021-02-19 17:50:07,953 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2113 transitions. Word has length 17 [2021-02-19 17:50:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:07,953 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2113 transitions. [2021-02-19 17:50:07,953 INFO L481 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) [2021-02-19 17:50:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2113 transitions. [2021-02-19 17:50:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:07,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:07,954 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:08,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1883,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:08,154 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash -288346815, now seen corresponding path program 266 times [2021-02-19 17:50:08,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:08,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489057862] [2021-02-19 17:50:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489057862] [2021-02-19 17:50:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657507151] [2021-02-19 17:50:08,583 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 [2021-02-19 17:50:08,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:08,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:09,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,033 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 [2021-02-19 17:50:09,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,047 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 17 treesize of output 13 [2021-02-19 17:50:09,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,062 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 [2021-02-19 17:50:09,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:09,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,236 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:09,238 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:50:09,238 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:09,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:09,241 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:50:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:09,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:09,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:09,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072306829] [2021-02-19 17:50:09,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:09,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:09,548 INFO L87 Difference]: Start difference. First operand 748 states and 2113 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) [2021-02-19 17:50:10,961 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-02-19 17:50:11,350 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-02-19 17:50:11,694 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:50:11,941 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-02-19 17:50:12,113 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-02-19 17:50:12,346 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:50:12,652 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:50:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:12,946 INFO L93 Difference]: Finished difference Result 863 states and 2359 transitions. [2021-02-19 17:50:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:50:12,948 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 [2021-02-19 17:50:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:12,950 INFO L225 Difference]: With dead ends: 863 [2021-02-19 17:50:12,950 INFO L226 Difference]: Without dead ends: 859 [2021-02-19 17:50:12,950 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:50:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-02-19 17:50:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 761. [2021-02-19 17:50:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.836842105263158) internal successors, (2156), 760 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2156 transitions. [2021-02-19 17:50:12,962 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2156 transitions. Word has length 17 [2021-02-19 17:50:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:12,963 INFO L480 AbstractCegarLoop]: Abstraction has 761 states and 2156 transitions. [2021-02-19 17:50:12,963 INFO L481 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) [2021-02-19 17:50:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2156 transitions. [2021-02-19 17:50:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:12,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:12,963 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:13,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:13,164 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:13,164 INFO L82 PathProgramCache]: Analyzing trace with hash -830513019, now seen corresponding path program 267 times [2021-02-19 17:50:13,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:13,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521544061] [2021-02-19 17:50:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:13,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521544061] [2021-02-19 17:50:13,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808073865] [2021-02-19 17:50:13,567 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 [2021-02-19 17:50:13,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:50:13,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:14,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:14,112 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 16 treesize of output 12 [2021-02-19 17:50:14,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:14,123 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 15 treesize of output 11 [2021-02-19 17:50:14,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,209 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:50:14,209 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:14,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:50:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:14,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:14,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:14,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096246837] [2021-02-19 17:50:14,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:14,309 INFO L87 Difference]: Start difference. First operand 761 states and 2156 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) [2021-02-19 17:50:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:16,706 INFO L93 Difference]: Finished difference Result 985 states and 2601 transitions. [2021-02-19 17:50:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:50:16,710 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 [2021-02-19 17:50:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:16,712 INFO L225 Difference]: With dead ends: 985 [2021-02-19 17:50:16,712 INFO L226 Difference]: Without dead ends: 985 [2021-02-19 17:50:16,712 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:50:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-02-19 17:50:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 779. [2021-02-19 17:50:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.8496143958868894) internal successors, (2217), 778 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2217 transitions. [2021-02-19 17:50:16,720 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2217 transitions. Word has length 17 [2021-02-19 17:50:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:16,720 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 2217 transitions. [2021-02-19 17:50:16,721 INFO L481 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) [2021-02-19 17:50:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2217 transitions. [2021-02-19 17:50:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:16,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:16,721 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:16,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1895,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:16,922 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1750213727, now seen corresponding path program 268 times [2021-02-19 17:50:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:16,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134174969] [2021-02-19 17:50:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:17,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134174969] [2021-02-19 17:50:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906555167] [2021-02-19 17:50:17,278 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 [2021-02-19 17:50:17,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:17,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:17,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,781 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 16 treesize of output 12 [2021-02-19 17:50:17,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,791 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 8 treesize of output 6 [2021-02-19 17:50:17,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:17,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:17,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,832 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 [2021-02-19 17:50:17,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,846 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 17 treesize of output 13 [2021-02-19 17:50:17,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,014 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:50:18,015 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:50:18,016 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:18,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:50:18,020 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:50:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:18,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:18,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:18,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292361204] [2021-02-19 17:50:18,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:18,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:18,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:18,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:18,164 INFO L87 Difference]: Start difference. First operand 779 states and 2217 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) [2021-02-19 17:50:19,655 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:50:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:20,680 INFO L93 Difference]: Finished difference Result 908 states and 2456 transitions. [2021-02-19 17:50:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:50:20,684 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 [2021-02-19 17:50:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:20,685 INFO L225 Difference]: With dead ends: 908 [2021-02-19 17:50:20,685 INFO L226 Difference]: Without dead ends: 904 [2021-02-19 17:50:20,685 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:50:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-02-19 17:50:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 779. [2021-02-19 17:50:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.840616966580977) internal successors, (2210), 778 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2210 transitions. [2021-02-19 17:50:20,694 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2210 transitions. Word has length 17 [2021-02-19 17:50:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:20,694 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 2210 transitions. [2021-02-19 17:50:20,694 INFO L481 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) [2021-02-19 17:50:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2210 transitions. [2021-02-19 17:50:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:20,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:20,695 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:20,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1898 [2021-02-19 17:50:20,896 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:20,896 INFO L82 PathProgramCache]: Analyzing trace with hash 784738565, now seen corresponding path program 269 times [2021-02-19 17:50:20,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:20,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573212055] [2021-02-19 17:50:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:21,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573212055] [2021-02-19 17:50:21,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330973965] [2021-02-19 17:50:21,346 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 [2021-02-19 17:50:21,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:50:21,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:21,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,770 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 [2021-02-19 17:50:21,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:21,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,784 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 17 treesize of output 13 [2021-02-19 17:50:21,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,800 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 16 treesize of output 12 [2021-02-19 17:50:21,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:21,813 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 15 treesize of output 11 [2021-02-19 17:50:21,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:21,997 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:21,998 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:50:21,998 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:22,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:22,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:50:22,297 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-02-19 17:50:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:22,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:22,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:22,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000726972] [2021-02-19 17:50:22,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:22,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:22,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:22,338 INFO L87 Difference]: Start difference. First operand 779 states and 2210 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) [2021-02-19 17:50:22,854 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-02-19 17:50:23,629 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 17:50:24,397 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:50:25,082 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:50:25,374 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-02-19 17:50:25,887 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:50:26,074 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-02-19 17:50:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:26,459 INFO L93 Difference]: Finished difference Result 978 states and 2578 transitions. [2021-02-19 17:50:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:50:26,461 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 [2021-02-19 17:50:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:26,463 INFO L225 Difference]: With dead ends: 978 [2021-02-19 17:50:26,463 INFO L226 Difference]: Without dead ends: 973 [2021-02-19 17:50:26,463 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:50:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-02-19 17:50:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 784. [2021-02-19 17:50:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.8288633461047255) internal successors, (2215), 783 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2215 transitions. [2021-02-19 17:50:26,472 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2215 transitions. Word has length 17 [2021-02-19 17:50:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:26,472 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 2215 transitions. [2021-02-19 17:50:26,472 INFO L481 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) [2021-02-19 17:50:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2215 transitions. [2021-02-19 17:50:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:26,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:26,473 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:26,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:26,674 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:26,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1982779679, now seen corresponding path program 270 times [2021-02-19 17:50:26,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:26,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478591206] [2021-02-19 17:50:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:27,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478591206] [2021-02-19 17:50:27,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072226606] [2021-02-19 17:50:27,058 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 [2021-02-19 17:50:27,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:50:27,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:27,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,518 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 16 treesize of output 12 [2021-02-19 17:50:27,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:27,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,532 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 [2021-02-19 17:50:27,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:27,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,546 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 16 treesize of output 12 [2021-02-19 17:50:27,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:27,559 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 15 treesize of output 11 [2021-02-19 17:50:27,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:27,716 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:27,717 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:50:27,717 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:27,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:27,719 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:50:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:27,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:27,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:27,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379388793] [2021-02-19 17:50:27,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:27,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:27,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:27,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:27,960 INFO L87 Difference]: Start difference. First operand 784 states and 2215 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) [2021-02-19 17:50:29,212 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-02-19 17:50:29,620 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-02-19 17:50:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:30,853 INFO L93 Difference]: Finished difference Result 1040 states and 2764 transitions. [2021-02-19 17:50:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:50:30,855 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 [2021-02-19 17:50:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:30,856 INFO L225 Difference]: With dead ends: 1040 [2021-02-19 17:50:30,856 INFO L226 Difference]: Without dead ends: 1039 [2021-02-19 17:50:30,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:50:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-02-19 17:50:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 835. [2021-02-19 17:50:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.86810551558753) internal successors, (2392), 834 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2392 transitions. [2021-02-19 17:50:30,869 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2392 transitions. Word has length 17 [2021-02-19 17:50:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:30,869 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2392 transitions. [2021-02-19 17:50:30,869 INFO L481 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) [2021-02-19 17:50:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2392 transitions. [2021-02-19 17:50:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:30,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:30,871 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:31,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1910,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:31,071 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:31,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1510571389, now seen corresponding path program 271 times [2021-02-19 17:50:31,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:31,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291857486] [2021-02-19 17:50:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:31,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291857486] [2021-02-19 17:50:31,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535328942] [2021-02-19 17:50:31,493 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 [2021-02-19 17:50:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:31,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,969 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 16 treesize of output 12 [2021-02-19 17:50:31,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,984 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 [2021-02-19 17:50:31,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,999 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 [2021-02-19 17:50:32,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:32,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,195 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:32,196 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:50:32,197 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:32,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:32,199 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:50:32,518 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-02-19 17:50:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:32,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:32,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131193020] [2021-02-19 17:50:32,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:32,555 INFO L87 Difference]: Start difference. First operand 835 states and 2392 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) [2021-02-19 17:50:34,284 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:50:34,909 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-02-19 17:50:35,547 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 17:50:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:36,162 INFO L93 Difference]: Finished difference Result 1022 states and 2761 transitions. [2021-02-19 17:50:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:50:36,165 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 [2021-02-19 17:50:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:36,167 INFO L225 Difference]: With dead ends: 1022 [2021-02-19 17:50:36,167 INFO L226 Difference]: Without dead ends: 1016 [2021-02-19 17:50:36,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:50:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-02-19 17:50:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 845. [2021-02-19 17:50:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.8578199052132702) internal successors, (2412), 844 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2412 transitions. [2021-02-19 17:50:36,177 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2412 transitions. Word has length 17 [2021-02-19 17:50:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:36,177 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2412 transitions. [2021-02-19 17:50:36,178 INFO L481 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) [2021-02-19 17:50:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2412 transitions. [2021-02-19 17:50:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:36,179 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:36,179 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:36,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1914 [2021-02-19 17:50:36,379 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:36,379 INFO L82 PathProgramCache]: Analyzing trace with hash 207772317, now seen corresponding path program 272 times [2021-02-19 17:50:36,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:36,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661959131] [2021-02-19 17:50:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:36,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661959131] [2021-02-19 17:50:36,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892551294] [2021-02-19 17:50:36,790 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 [2021-02-19 17:50:36,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:36,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:36,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:50:37,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,238 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 17 treesize of output 13 [2021-02-19 17:50:37,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:50:37,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,266 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 [2021-02-19 17:50:37,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,382 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:37,383 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:50:37,383 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:37,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:37,384 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:50:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:37,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:37,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:37,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977387714] [2021-02-19 17:50:37,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:37,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:37,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:37,529 INFO L87 Difference]: Start difference. First operand 845 states and 2412 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) [2021-02-19 17:50:39,377 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 17:50:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:39,888 INFO L93 Difference]: Finished difference Result 1020 states and 2731 transitions. [2021-02-19 17:50:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:50:39,893 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 [2021-02-19 17:50:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:39,895 INFO L225 Difference]: With dead ends: 1020 [2021-02-19 17:50:39,895 INFO L226 Difference]: Without dead ends: 1020 [2021-02-19 17:50:39,895 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:50:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-02-19 17:50:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 831. [2021-02-19 17:50:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.842168674698795) internal successors, (2359), 830 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2359 transitions. [2021-02-19 17:50:39,905 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2359 transitions. Word has length 17 [2021-02-19 17:50:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:39,905 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2359 transitions. [2021-02-19 17:50:39,905 INFO L481 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) [2021-02-19 17:50:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2359 transitions. [2021-02-19 17:50:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:39,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:39,906 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:40,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1920,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:40,107 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1502840991, now seen corresponding path program 273 times [2021-02-19 17:50:40,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:40,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077319777] [2021-02-19 17:50:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:40,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077319777] [2021-02-19 17:50:40,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870488599] [2021-02-19 17:50:40,446 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 [2021-02-19 17:50:40,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:50:40,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:40,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,951 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 [2021-02-19 17:50:40,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:40,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,964 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 15 treesize of output 11 [2021-02-19 17:50:40,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:41,050 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-02-19 17:50:41,050 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:41,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:41,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-02-19 17:50:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:41,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:41,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:41,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618202164] [2021-02-19 17:50:41,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:41,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:41,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:41,183 INFO L87 Difference]: Start difference. First operand 831 states and 2359 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) [2021-02-19 17:50:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:43,224 INFO L93 Difference]: Finished difference Result 1026 states and 2741 transitions. [2021-02-19 17:50:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:50:43,226 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 [2021-02-19 17:50:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:43,228 INFO L225 Difference]: With dead ends: 1026 [2021-02-19 17:50:43,228 INFO L226 Difference]: Without dead ends: 1026 [2021-02-19 17:50:43,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:50:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-02-19 17:50:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 827. [2021-02-19 17:50:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.8389830508474576) internal successors, (2345), 826 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2345 transitions. [2021-02-19 17:50:43,238 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2345 transitions. Word has length 17 [2021-02-19 17:50:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:43,238 INFO L480 AbstractCegarLoop]: Abstraction has 827 states and 2345 transitions. [2021-02-19 17:50:43,238 INFO L481 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) [2021-02-19 17:50:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2345 transitions. [2021-02-19 17:50:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:43,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:43,239 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:43,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1924 [2021-02-19 17:50:43,439 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1801815869, now seen corresponding path program 274 times [2021-02-19 17:50:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:43,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881629918] [2021-02-19 17:50:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:43,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881629918] [2021-02-19 17:50:43,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066507276] [2021-02-19 17:50:43,817 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 [2021-02-19 17:50:43,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:43,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:43,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:44,389 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 16 treesize of output 12 [2021-02-19 17:50:44,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:44,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:44,397 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 15 treesize of output 11 [2021-02-19 17:50:44,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:44,448 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:50:44,448 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:44,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:44,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:50:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:44,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:44,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629236630] [2021-02-19 17:50:44,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:44,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:44,531 INFO L87 Difference]: Start difference. First operand 827 states and 2345 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) [2021-02-19 17:50:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:45,656 INFO L93 Difference]: Finished difference Result 951 states and 2581 transitions. [2021-02-19 17:50:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:50:45,660 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 [2021-02-19 17:50:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:45,661 INFO L225 Difference]: With dead ends: 951 [2021-02-19 17:50:45,661 INFO L226 Difference]: Without dead ends: 951 [2021-02-19 17:50:45,661 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-02-19 17:50:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 855. [2021-02-19 17:50:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.838407494145199) internal successors, (2424), 854 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2424 transitions. [2021-02-19 17:50:45,670 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2424 transitions. Word has length 17 [2021-02-19 17:50:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:45,670 INFO L480 AbstractCegarLoop]: Abstraction has 855 states and 2424 transitions. [2021-02-19 17:50:45,670 INFO L481 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) [2021-02-19 17:50:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2424 transitions. [2021-02-19 17:50:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:45,671 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:45,671 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:45,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1926,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:45,872 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1562268839, now seen corresponding path program 275 times [2021-02-19 17:50:45,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:45,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923596952] [2021-02-19 17:50:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923596952] [2021-02-19 17:50:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248717647] [2021-02-19 17:50:46,228 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 [2021-02-19 17:50:46,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:50:46,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:46,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:47,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:47,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:47,043 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 [2021-02-19 17:50:47,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,054 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 [2021-02-19 17:50:47,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:47,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:47,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,091 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 [2021-02-19 17:50:47,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:47,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:47,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,252 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:50:47,253 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:50:47,254 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:47,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:50:47,257 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:50:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:47,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:47,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:47,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723830407] [2021-02-19 17:50:47,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:47,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:47,407 INFO L87 Difference]: Start difference. First operand 855 states and 2424 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) [2021-02-19 17:50:48,124 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:50:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:49,496 INFO L93 Difference]: Finished difference Result 938 states and 2555 transitions. [2021-02-19 17:50:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:50:49,500 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 [2021-02-19 17:50:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:49,501 INFO L225 Difference]: With dead ends: 938 [2021-02-19 17:50:49,501 INFO L226 Difference]: Without dead ends: 930 [2021-02-19 17:50:49,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:50:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-02-19 17:50:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 866. [2021-02-19 17:50:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.832369942196532) internal successors, (2450), 865 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2450 transitions. [2021-02-19 17:50:49,512 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2450 transitions. Word has length 17 [2021-02-19 17:50:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:49,512 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 2450 transitions. [2021-02-19 17:50:49,512 INFO L481 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) [2021-02-19 17:50:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2450 transitions. [2021-02-19 17:50:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:49,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:49,513 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:49,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1929 [2021-02-19 17:50:49,713 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash 640793755, now seen corresponding path program 276 times [2021-02-19 17:50:49,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:49,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084082750] [2021-02-19 17:50:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:50,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084082750] [2021-02-19 17:50:50,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298540167] [2021-02-19 17:50:50,069 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 [2021-02-19 17:50:50,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:50,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:50,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:50,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:50,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:50,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:50:50,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:50,737 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 [2021-02-19 17:50:50,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,844 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-02-19 17:50:50,845 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:50:50,845 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:50,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:50:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:50,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:50,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:50,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511580528] [2021-02-19 17:50:50,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:50,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:50,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:50,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:50,955 INFO L87 Difference]: Start difference. First operand 866 states and 2450 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) [2021-02-19 17:50:51,957 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:50:52,483 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 17:50:53,001 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 17:50:53,591 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:50:54,060 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:50:54,327 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:50:54,521 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:50:54,801 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 17:50:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:55,242 INFO L93 Difference]: Finished difference Result 1024 states and 2723 transitions. [2021-02-19 17:50:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:50:55,246 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 [2021-02-19 17:50:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:55,247 INFO L225 Difference]: With dead ends: 1024 [2021-02-19 17:50:55,247 INFO L226 Difference]: Without dead ends: 1024 [2021-02-19 17:50:55,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 17:50:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-02-19 17:50:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 862. [2021-02-19 17:50:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8408826945412313) internal successors, (2446), 861 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) [2021-02-19 17:50:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2446 transitions. [2021-02-19 17:50:55,256 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2446 transitions. Word has length 17 [2021-02-19 17:50:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:55,257 INFO L480 AbstractCegarLoop]: Abstraction has 862 states and 2446 transitions. [2021-02-19 17:50:55,257 INFO L481 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) [2021-02-19 17:50:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2446 transitions. [2021-02-19 17:50:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:55,258 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:55,258 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:55,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:55,458 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:55,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2100124417, now seen corresponding path program 277 times [2021-02-19 17:50:55,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:55,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612340275] [2021-02-19 17:50:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:55,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612340275] [2021-02-19 17:50:55,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161163762] [2021-02-19 17:50:55,834 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 [2021-02-19 17:50:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:56,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,475 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 [2021-02-19 17:50:56,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,488 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 8 treesize of output 6 [2021-02-19 17:50:56,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,503 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 [2021-02-19 17:50:56,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,517 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 [2021-02-19 17:50:56,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:50:56,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,543 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 17 treesize of output 13 [2021-02-19 17:50:56,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,712 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:50:56,714 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:50:56,714 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:50:56,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:50:56,718 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:50:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:56,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:56,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:56,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342660292] [2021-02-19 17:50:56,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:56,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:56,868 INFO L87 Difference]: Start difference. First operand 862 states and 2446 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) [2021-02-19 17:50:57,890 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:50:58,561 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 17:50:59,106 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-02-19 17:50:59,691 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 17:50:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:59,810 INFO L93 Difference]: Finished difference Result 942 states and 2567 transitions. [2021-02-19 17:50:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:50:59,814 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 [2021-02-19 17:50:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:59,815 INFO L225 Difference]: With dead ends: 942 [2021-02-19 17:50:59,815 INFO L226 Difference]: Without dead ends: 939 [2021-02-19 17:50:59,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:50:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-02-19 17:50:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 866. [2021-02-19 17:50:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.838150289017341) internal successors, (2455), 865 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2455 transitions. [2021-02-19 17:50:59,825 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2455 transitions. Word has length 17 [2021-02-19 17:50:59,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:59,825 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 2455 transitions. [2021-02-19 17:50:59,825 INFO L481 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) [2021-02-19 17:50:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2455 transitions. [2021-02-19 17:50:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:59,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:59,826 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:00,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1939,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:00,026 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash 880436093, now seen corresponding path program 278 times [2021-02-19 17:51:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:00,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592914548] [2021-02-19 17:51:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:00,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592914548] [2021-02-19 17:51:00,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201906585] [2021-02-19 17:51:00,465 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 [2021-02-19 17:51:00,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:00,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:51:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:01,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:51:01,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:01,220 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 15 treesize of output 11 [2021-02-19 17:51:01,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:01,319 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-02-19 17:51:01,319 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:51:01,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:01,321 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-02-19 17:51:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:01,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:01,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:01,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454164175] [2021-02-19 17:51:01,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:01,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:01,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:01,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:01,382 INFO L87 Difference]: Start difference. First operand 866 states and 2455 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) [2021-02-19 17:51:02,949 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:51:04,462 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:51:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:04,796 INFO L93 Difference]: Finished difference Result 938 states and 2571 transitions. [2021-02-19 17:51:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:51:04,799 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 [2021-02-19 17:51:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:04,801 INFO L225 Difference]: With dead ends: 938 [2021-02-19 17:51:04,801 INFO L226 Difference]: Without dead ends: 938 [2021-02-19 17:51:04,801 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:51:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-02-19 17:51:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 843. [2021-02-19 17:51:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.836104513064133) internal successors, (2388), 842 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2388 transitions. [2021-02-19 17:51:04,811 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2388 transitions. Word has length 17 [2021-02-19 17:51:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:04,811 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2388 transitions. [2021-02-19 17:51:04,811 INFO L481 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) [2021-02-19 17:51:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2388 transitions. [2021-02-19 17:51:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:51:04,812 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:04,812 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:05,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1946 [2021-02-19 17:51:05,012 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash -39264615, now seen corresponding path program 279 times [2021-02-19 17:51:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345398153] [2021-02-19 17:51:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:05,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345398153] [2021-02-19 17:51:05,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949179974] [2021-02-19 17:51:05,452 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 [2021-02-19 17:51:05,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:51:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:51:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:06,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:06,280 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 16 treesize of output 12 [2021-02-19 17:51:06,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:06,294 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 [2021-02-19 17:51:06,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:06,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:51:06,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:06,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-02-19 17:51:06,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:06,336 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 7 treesize of output 5 [2021-02-19 17:51:06,342 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:06,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:06,351 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 [2021-02-19 17:51:06,356 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:06,489 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-02-19 17:51:06,490 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-02-19 17:51:06,490 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:51:06,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:06,493 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-02-19 17:51:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:06,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:06,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:06,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793600688] [2021-02-19 17:51:06,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:06,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:06,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:06,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:06,570 INFO L87 Difference]: Start difference. First operand 843 states and 2388 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) [2021-02-19 17:51:07,775 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:51:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:08,035 INFO L93 Difference]: Finished difference Result 876 states and 2446 transitions. [2021-02-19 17:51:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:51:08,038 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 [2021-02-19 17:51:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:08,039 INFO L225 Difference]: With dead ends: 876 [2021-02-19 17:51:08,039 INFO L226 Difference]: Without dead ends: 874 [2021-02-19 17:51:08,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:51:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-02-19 17:51:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 843. [2021-02-19 17:51:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.834916864608076) internal successors, (2387), 842 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2387 transitions. [2021-02-19 17:51:08,047 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2387 transitions. Word has length 17 [2021-02-19 17:51:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:08,047 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2387 transitions. [2021-02-19 17:51:08,047 INFO L481 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) [2021-02-19 17:51:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2387 transitions. [2021-02-19 17:51:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:51:08,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:08,048 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:08,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1949,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:08,249 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 888166491, now seen corresponding path program 280 times [2021-02-19 17:51:08,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:08,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810084957] [2021-02-19 17:51:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:08,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810084957] [2021-02-19 17:51:08,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463704098] [2021-02-19 17:51:08,736 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 [2021-02-19 17:51:08,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:08,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:51:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,317 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 16 treesize of output 12 [2021-02-19 17:51:09,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,330 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 [2021-02-19 17:51:09,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,343 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 [2021-02-19 17:51:09,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:09,354 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 15 treesize of output 11 [2021-02-19 17:51:09,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,450 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-02-19 17:51:09,451 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:51:09,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:09,452 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-02-19 17:51:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:09,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:09,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:09,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962755682] [2021-02-19 17:51:09,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:09,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:09,575 INFO L87 Difference]: Start difference. First operand 843 states and 2387 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) [2021-02-19 17:51:10,059 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-02-19 17:51:10,281 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-02-19 17:51:10,715 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 Received shutdown request... [2021-02-19 17:51:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:51:10,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1956 [2021-02-19 17:51:10,958 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:51:10,961 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:51:10,962 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:51:10 BasicIcfg [2021-02-19 17:51:10,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:51:10,963 INFO L168 Benchmark]: Toolchain (without parser) took 548249.70 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 236.5 MB in the beginning and 200.0 MB in the end (delta: 36.6 MB). Peak memory consumption was 197.4 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:10,963 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:51:10,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.36 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:51:10,963 INFO L168 Benchmark]: Boogie Preprocessor took 24.68 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.5 MB in the end (delta: 947.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:10,963 INFO L168 Benchmark]: RCFGBuilder took 396.52 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 230.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:10,963 INFO L168 Benchmark]: TraceAbstraction took 547792.92 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 230.4 MB in the beginning and 200.0 MB in the end (delta: 30.4 MB). Peak memory consumption was 190.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:10,963 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 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.36 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.68 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.5 MB in the end (delta: 947.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 396.52 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 230.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 547792.92 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 230.4 MB in the beginning and 200.0 MB in the end (delta: 30.4 MB). Peak memory consumption was 190.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was constructing difference of abstraction (843states) and FLOYD_HOARE automaton (currently 11 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (58 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 547.6s, OverallIterations: 294, TraceHistogramMax: 4, AutomataDifference: 287.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7748 SDtfs, 15287 SDslu, 51926 SDs, 0 SdLazy, 104781 SolverSat, 3704 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9517 GetRequests, 2803 SyntacticMatches, 321 SemanticMatches, 6393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30167 ImplicationChecksByTransitivity, 288.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=866occurred in iteration=289, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 293 MinimizatonAttempts, 23991 StatesRemovedByMinimization, 293 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 191.4s InterpolantComputationTime, 8946 NumberOfCodeBlocks, 8946 NumberOfCodeBlocksAsserted, 957 NumberOfCheckSat, 8368 ConstructedInterpolants, 243 QuantifiedInterpolants, 1645384 SizeOfPredicates, 1816 NumberOfNonLiveVariables, 20584 ConjunctsInSsa, 6401 ConjunctsInUnsatCore, 578 InterpolantComputations, 10 PerfectInterpolantSequences, 1093/6428 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