/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:43:13,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:43:13,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:43:13,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:43:13,699 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 [2021-03-10 21:43:13,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:43:13,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:43:13,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:43:13,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:43:13,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:43:13,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:43:13,734 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:43:13,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:43:13,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:43:13,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:43:13,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:43:13,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:43:13,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:43:13,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:43:13,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:43:13,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:43:13,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:43:14,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:43:14,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:43:14,010 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:43:14,011 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:43:14,012 INFO L432 ainManager$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 [2021-03-10 21:43:14,012 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-03-10 21:43:14,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:43:14,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:43:14,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:43:14,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:43:14,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:43:14,087 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,093 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:43:14,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:43:14,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:43:14,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:43:14,105 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,105 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,107 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,107 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,109 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,111 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,112 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 10.03 09:43:14" (1/1) ... [2021-03-10 21:43:14,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:43:14,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:43:14,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:43:14,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:43:14,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:14" (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 [2021-03-10 21:43:14,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:43:14,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:43:14,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:43:14,164 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:43:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:43:14,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:43:14,164 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:43:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:43:14,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:43:14,165 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:43:14,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:43:14,413 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:43:14,414 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:43:14,414 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 21:43:14,415 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:43:14 BoogieIcfgContainer [2021-03-10 21:43:14,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:43:14,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:43:14,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:43:14,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:43:14,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:14" (1/2) ... [2021-03-10 21:43:14,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b3c82 and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:43:14, skipping insertion in model container [2021-03-10 21:43:14,420 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 10.03 09:43:14" (2/2) ... [2021-03-10 21:43:14,420 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-03-10 21:43:14,424 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:43:14,424 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:43:14,427 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:43:14,428 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:43:14,458 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:43:14,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:43:14,494 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:43:14,495 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:43:14,495 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:43:14,495 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:43:14,496 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:43:14,496 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:43:14,496 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:43:14,496 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:43:14,505 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-03-10 21:43:14,512 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) [2021-03-10 21:43:14,514 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) [2021-03-10 21:43:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:43:14,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:14,519 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:14,519 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash -381977242, now seen corresponding path program 1 times [2021-03-10 21:43:14,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:14,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770977791] [2021-03-10 21:43:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:14,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770977791] [2021-03-10 21:43:14,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:14,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:43:14,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149600341] [2021-03-10 21:43:14,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:43:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:43:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:43:14,730 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) [2021-03-10 21:43:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:14,793 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2021-03-10 21:43:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:43:14,795 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 [2021-03-10 21:43:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:14,801 INFO L225 Difference]: With dead ends: 40 [2021-03-10 21:43:14,802 INFO L226 Difference]: Without dead ends: 37 [2021-03-10 21:43:14,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-03-10 21:43:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-03-10 21:43:14,824 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) [2021-03-10 21:43:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-03-10 21:43:14,825 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2021-03-10 21:43:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-03-10 21:43:14,825 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) [2021-03-10 21:43:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-03-10 21:43:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:43:14,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:14,826 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:14,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:43:14,826 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:14,827 INFO L82 PathProgramCache]: Analyzing trace with hash -481455702, now seen corresponding path program 2 times [2021-03-10 21:43:14,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:14,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490073909] [2021-03-10 21:43:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:14,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490073909] [2021-03-10 21:43:14,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:14,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:43:14,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479066851] [2021-03-10 21:43:14,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:43:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:43:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:43:14,879 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) [2021-03-10 21:43:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:14,937 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-03-10 21:43:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:43:14,937 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 [2021-03-10 21:43:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:14,938 INFO L225 Difference]: With dead ends: 46 [2021-03-10 21:43:14,938 INFO L226 Difference]: Without dead ends: 43 [2021-03-10 21:43:14,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-10 21:43:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-03-10 21:43:14,945 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) [2021-03-10 21:43:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-03-10 21:43:14,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2021-03-10 21:43:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:14,945 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-03-10 21:43:14,946 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) [2021-03-10 21:43:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-03-10 21:43:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:14,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:14,946 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:14,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:43:14,946 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1042522380, now seen corresponding path program 1 times [2021-03-10 21:43:14,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:14,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802918191] [2021-03-10 21:43:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:14,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802918191] [2021-03-10 21:43:14,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:14,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:14,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668520057] [2021-03-10 21:43:14,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:14,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:14,981 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) [2021-03-10 21:43:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:15,036 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2021-03-10 21:43:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:15,037 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 [2021-03-10 21:43:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:15,039 INFO L225 Difference]: With dead ends: 41 [2021-03-10 21:43:15,040 INFO L226 Difference]: Without dead ends: 36 [2021-03-10 21:43:15,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-03-10 21:43:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-03-10 21:43:15,044 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) [2021-03-10 21:43:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2021-03-10 21:43:15,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2021-03-10 21:43:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:15,045 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2021-03-10 21:43:15,045 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) [2021-03-10 21:43:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2021-03-10 21:43:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:15,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:15,045 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:15,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:43:15,046 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:15,046 INFO L82 PathProgramCache]: Analyzing trace with hash -707752582, now seen corresponding path program 1 times [2021-03-10 21:43:15,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:15,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596097090] [2021-03-10 21:43:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596097090] [2021-03-10 21:43:15,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469564140] [2021-03-10 21:43:15,074 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 [2021-03-10 21:43:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:43:15,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:15,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:43:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730796214] [2021-03-10 21:43:15,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:43:15,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:43:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:43:15,189 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) [2021-03-10 21:43:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:15,274 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2021-03-10 21:43:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:15,276 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 [2021-03-10 21:43:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:15,276 INFO L225 Difference]: With dead ends: 39 [2021-03-10 21:43:15,277 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 21:43:15,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 21:43:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-03-10 21:43:15,284 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) [2021-03-10 21:43:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2021-03-10 21:43:15,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2021-03-10 21:43:15,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:15,285 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2021-03-10 21:43:15,285 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) [2021-03-10 21:43:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2021-03-10 21:43:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:15,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:15,285 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:15,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:15,499 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -742242342, now seen corresponding path program 2 times [2021-03-10 21:43:15,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:15,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903461359] [2021-03-10 21:43:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903461359] [2021-03-10 21:43:15,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043429081] [2021-03-10 21:43:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:43:15,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:15,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:43:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:15,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:43:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32822515] [2021-03-10 21:43:15,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:15,653 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) [2021-03-10 21:43:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:15,692 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2021-03-10 21:43:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:15,694 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 [2021-03-10 21:43:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:15,694 INFO L225 Difference]: With dead ends: 52 [2021-03-10 21:43:15,694 INFO L226 Difference]: Without dead ends: 52 [2021-03-10 21:43:15,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-03-10 21:43:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-03-10 21:43:15,697 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) [2021-03-10 21:43:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2021-03-10 21:43:15,698 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2021-03-10 21:43:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:15,699 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2021-03-10 21:43:15,699 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) [2021-03-10 21:43:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2021-03-10 21:43:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:15,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:15,699 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:15,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:15,907 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash 59373886, now seen corresponding path program 2 times [2021-03-10 21:43:15,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:15,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637558828] [2021-03-10 21:43:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637558828] [2021-03-10 21:43:15,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:15,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657321170] [2021-03-10 21:43:15,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:15,943 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) [2021-03-10 21:43:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:15,975 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-03-10 21:43:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:15,976 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 [2021-03-10 21:43:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:15,976 INFO L225 Difference]: With dead ends: 42 [2021-03-10 21:43:15,976 INFO L226 Difference]: Without dead ends: 41 [2021-03-10 21:43:15,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-03-10 21:43:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-03-10 21:43:15,979 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) [2021-03-10 21:43:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-03-10 21:43:15,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2021-03-10 21:43:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:15,980 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-03-10 21:43:15,980 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) [2021-03-10 21:43:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-03-10 21:43:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:15,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:15,980 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:15,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:43:15,980 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash 865278844, now seen corresponding path program 3 times [2021-03-10 21:43:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:15,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929799970] [2021-03-10 21:43:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929799970] [2021-03-10 21:43:16,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:16,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:16,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740216242] [2021-03-10 21:43:16,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:16,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:16,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:16,007 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) [2021-03-10 21:43:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,039 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-03-10 21:43:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:16,040 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 [2021-03-10 21:43:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,040 INFO L225 Difference]: With dead ends: 46 [2021-03-10 21:43:16,040 INFO L226 Difference]: Without dead ends: 44 [2021-03-10 21:43:16,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-03-10 21:43:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-03-10 21:43:16,043 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) [2021-03-10 21:43:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-03-10 21:43:16,043 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2021-03-10 21:43:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,043 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-03-10 21:43:16,043 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) [2021-03-10 21:43:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-03-10 21:43:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:16,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,044 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:16,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 21:43:16,044 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1777717592, now seen corresponding path program 3 times [2021-03-10 21:43:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:16,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117641615] [2021-03-10 21:43:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117641615] [2021-03-10 21:43:16,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:16,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874419906] [2021-03-10 21:43:16,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:16,091 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) [2021-03-10 21:43:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,130 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2021-03-10 21:43:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:16,131 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 [2021-03-10 21:43:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,131 INFO L225 Difference]: With dead ends: 38 [2021-03-10 21:43:16,131 INFO L226 Difference]: Without dead ends: 38 [2021-03-10 21:43:16,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-03-10 21:43:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-03-10 21:43:16,139 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) [2021-03-10 21:43:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-03-10 21:43:16,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2021-03-10 21:43:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,140 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-03-10 21:43:16,141 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) [2021-03-10 21:43:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-03-10 21:43:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:16,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,142 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:16,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:43:16,142 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 617529826, now seen corresponding path program 4 times [2021-03-10 21:43:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:16,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063221309] [2021-03-10 21:43:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063221309] [2021-03-10 21:43:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657420136] [2021-03-10 21:43:16,180 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 [2021-03-10 21:43:16,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:43:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:16,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:43:16,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925908545] [2021-03-10 21:43:16,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:43:16,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:43:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:43:16,236 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) [2021-03-10 21:43:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,283 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-03-10 21:43:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:16,285 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 [2021-03-10 21:43:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,286 INFO L225 Difference]: With dead ends: 42 [2021-03-10 21:43:16,286 INFO L226 Difference]: Without dead ends: 42 [2021-03-10 21:43:16,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-03-10 21:43:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-03-10 21:43:16,288 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) [2021-03-10 21:43:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2021-03-10 21:43:16,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2021-03-10 21:43:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,288 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2021-03-10 21:43:16,288 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) [2021-03-10 21:43:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2021-03-10 21:43:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:16,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,289 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:16,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:16,501 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2019919942, now seen corresponding path program 4 times [2021-03-10 21:43:16,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:16,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770620868] [2021-03-10 21:43:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770620868] [2021-03-10 21:43:16,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:16,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:16,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437279738] [2021-03-10 21:43:16,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:16,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:16,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:16,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:16,534 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) [2021-03-10 21:43:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,567 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2021-03-10 21:43:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:16,567 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 [2021-03-10 21:43:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,567 INFO L225 Difference]: With dead ends: 41 [2021-03-10 21:43:16,567 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 21:43:16,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 21:43:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-03-10 21:43:16,569 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) [2021-03-10 21:43:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-03-10 21:43:16,569 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-03-10 21:43:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,570 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-03-10 21:43:16,570 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) [2021-03-10 21:43:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-03-10 21:43:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:16,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,570 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:16,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:43:16,570 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1491865152, now seen corresponding path program 5 times [2021-03-10 21:43:16,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:16,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897152254] [2021-03-10 21:43:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897152254] [2021-03-10 21:43:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841186394] [2021-03-10 21:43:16,607 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 [2021-03-10 21:43:16,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:16,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:16,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:43:16,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:16,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:43:16,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737912857] [2021-03-10 21:43:16,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:16,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:16,719 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) [2021-03-10 21:43:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,762 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-03-10 21:43:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:16,763 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 [2021-03-10 21:43:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,763 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:43:16,763 INFO L226 Difference]: Without dead ends: 44 [2021-03-10 21:43:16,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-03-10 21:43:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-03-10 21:43:16,765 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) [2021-03-10 21:43:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-03-10 21:43:16,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-03-10 21:43:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,765 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-03-10 21:43:16,765 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) [2021-03-10 21:43:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-03-10 21:43:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:16,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,766 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:16,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:16,979 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2001485916, now seen corresponding path program 5 times [2021-03-10 21:43:16,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:16,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711737027] [2021-03-10 21:43:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711737027] [2021-03-10 21:43:17,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:17,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:17,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124341723] [2021-03-10 21:43:17,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:17,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:17,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:17,013 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) [2021-03-10 21:43:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:17,042 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2021-03-10 21:43:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:17,047 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 [2021-03-10 21:43:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:17,047 INFO L225 Difference]: With dead ends: 41 [2021-03-10 21:43:17,047 INFO L226 Difference]: Without dead ends: 40 [2021-03-10 21:43:17,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-10 21:43:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-03-10 21:43:17,053 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) [2021-03-10 21:43:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2021-03-10 21:43:17,055 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2021-03-10 21:43:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:17,055 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2021-03-10 21:43:17,055 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) [2021-03-10 21:43:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2021-03-10 21:43:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:17,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:17,059 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:17,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 21:43:17,059 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1195580958, now seen corresponding path program 6 times [2021-03-10 21:43:17,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:17,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772257009] [2021-03-10 21:43:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772257009] [2021-03-10 21:43:17,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:17,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:17,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866652304] [2021-03-10 21:43:17,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:17,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:17,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:17,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:17,091 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) [2021-03-10 21:43:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:17,129 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2021-03-10 21:43:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:17,129 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 [2021-03-10 21:43:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:17,129 INFO L225 Difference]: With dead ends: 35 [2021-03-10 21:43:17,129 INFO L226 Difference]: Without dead ends: 33 [2021-03-10 21:43:17,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-03-10 21:43:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-03-10 21:43:17,141 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) [2021-03-10 21:43:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2021-03-10 21:43:17,141 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2021-03-10 21:43:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:17,141 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2021-03-10 21:43:17,141 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) [2021-03-10 21:43:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2021-03-10 21:43:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:43:17,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:17,145 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:17,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 21:43:17,145 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash -283142210, now seen corresponding path program 6 times [2021-03-10 21:43:17,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:17,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096916018] [2021-03-10 21:43:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096916018] [2021-03-10 21:43:17,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:17,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:17,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779310293] [2021-03-10 21:43:17,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:17,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:17,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:17,169 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) [2021-03-10 21:43:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:17,212 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2021-03-10 21:43:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:17,213 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 [2021-03-10 21:43:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:17,213 INFO L225 Difference]: With dead ends: 32 [2021-03-10 21:43:17,213 INFO L226 Difference]: Without dead ends: 32 [2021-03-10 21:43:17,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-03-10 21:43:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-03-10 21:43:17,214 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) [2021-03-10 21:43:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-03-10 21:43:17,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-03-10 21:43:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:17,214 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-03-10 21:43:17,214 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) [2021-03-10 21:43:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-03-10 21:43:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:43:17,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:17,215 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:17,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 21:43:17,215 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash -466578568, now seen corresponding path program 1 times [2021-03-10 21:43:17,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:17,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901843235] [2021-03-10 21:43:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901843235] [2021-03-10 21:43:17,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915591608] [2021-03-10 21:43:17,588 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) [2021-03-10 21:43:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:43:17,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:17,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:17,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:17,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:43:17,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:17,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-03-10 21:43:17,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:18,011 INFO L628 ElimStorePlain]: treesize reduction 73, result has 13.1 percent of original size [2021-03-10 21:43:18,012 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:18,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-03-10 21:43:18,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2021-03-10 21:43:18,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:18,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-03-10 21:43:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:18,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:18,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-03-10 21:43:18,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154514103] [2021-03-10 21:43:18,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:18,045 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:18,425 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2021-03-10 21:43:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:18,597 INFO L93 Difference]: Finished difference Result 56 states and 104 transitions. [2021-03-10 21:43:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:18,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:43:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:18,598 INFO L225 Difference]: With dead ends: 56 [2021-03-10 21:43:18,598 INFO L226 Difference]: Without dead ends: 53 [2021-03-10 21:43:18,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 756.4ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-03-10 21:43:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2021-03-10 21:43:18,599 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) [2021-03-10 21:43:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-03-10 21:43:18,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2021-03-10 21:43:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:18,600 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-03-10 21:43:18,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-03-10 21:43:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:43:18,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:18,600 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:18,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:43:18,801 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1514371190, now seen corresponding path program 2 times [2021-03-10 21:43:18,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:18,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953465817] [2021-03-10 21:43:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:18,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953465817] [2021-03-10 21:43:18,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995305983] [2021-03-10 21:43:18,984 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 [2021-03-10 21:43:19,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:19,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:43:19,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:43:19,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:19,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:19,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:43:19,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:19,203 INFO L628 ElimStorePlain]: treesize reduction 77, result has 12.5 percent of original size [2021-03-10 21:43:19,203 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:19,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-03-10 21:43:19,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-03-10 21:43:19,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:19,204 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:107, output treesize:11 [2021-03-10 21:43:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:19,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:19,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:19,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530147737] [2021-03-10 21:43:19,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:19,229 INFO L87 Difference]: Start difference. First operand 37 states and 72 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) [2021-03-10 21:43:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:19,392 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2021-03-10 21:43:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:43:19,392 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 [2021-03-10 21:43:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:19,392 INFO L225 Difference]: With dead ends: 48 [2021-03-10 21:43:19,393 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 21:43:19,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 21:43:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-03-10 21:43:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-03-10 21:43:19,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-03-10 21:43:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:19,394 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-03-10 21:43:19,395 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) [2021-03-10 21:43:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-03-10 21:43:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:43:19,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:19,395 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:19,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:19,596 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1506640792, now seen corresponding path program 3 times [2021-03-10 21:43:19,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:19,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220967018] [2021-03-10 21:43:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220967018] [2021-03-10 21:43:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892976059] [2021-03-10 21:43:19,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:19,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:43:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:19,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:19,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-03-10 21:43:19,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:19,869 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 25 treesize of output 19 [2021-03-10 21:43:19,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:19,881 INFO L628 ElimStorePlain]: treesize reduction 79, result has 12.2 percent of original size [2021-03-10 21:43:19,881 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:43:19,881 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-03-10 21:43:19,881 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:19,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:19,882 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-03-10 21:43:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:19,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:19,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:43:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119123903] [2021-03-10 21:43:19,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:19,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:19,893 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2021-03-10 21:43:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:20,010 INFO L93 Difference]: Finished difference Result 60 states and 113 transitions. [2021-03-10 21:43:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 12 [2021-03-10 21:43:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:20,011 INFO L225 Difference]: With dead ends: 60 [2021-03-10 21:43:20,011 INFO L226 Difference]: Without dead ends: 57 [2021-03-10 21:43:20,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-03-10 21:43:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2021-03-10 21:43:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 94 transitions. [2021-03-10 21:43:20,012 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 94 transitions. Word has length 12 [2021-03-10 21:43:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:20,013 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 94 transitions. [2021-03-10 21:43:20,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2021-03-10 21:43:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 94 transitions. [2021-03-10 21:43:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:43:20,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:20,013 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:20,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:20,227 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1983860354, now seen corresponding path program 4 times [2021-03-10 21:43:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:20,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468693691] [2021-03-10 21:43:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:20,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468693691] [2021-03-10 21:43:20,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084709815] [2021-03-10 21:43:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:43:20,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:20,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:43:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:20,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:43:20,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:20,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:20,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:43:20,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:20,686 INFO L628 ElimStorePlain]: treesize reduction 73, result has 13.1 percent of original size [2021-03-10 21:43:20,686 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:20,686 INFO L518 ElimStorePlain]: Eliminatee v_prenex_14 vanished before elimination [2021-03-10 21:43:20,686 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-03-10 21:43:20,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:20,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-03-10 21:43:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:20,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:20,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:20,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548656440] [2021-03-10 21:43:20,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:20,707 INFO L87 Difference]: Start difference. First operand 45 states and 94 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) [2021-03-10 21:43:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:20,913 INFO L93 Difference]: Finished difference Result 75 states and 153 transitions. [2021-03-10 21:43:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:20,914 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 [2021-03-10 21:43:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:20,914 INFO L225 Difference]: With dead ends: 75 [2021-03-10 21:43:20,914 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 21:43:20,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 21:43:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2021-03-10 21:43:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 98 transitions. [2021-03-10 21:43:20,918 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 98 transitions. Word has length 12 [2021-03-10 21:43:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:20,918 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 98 transitions. [2021-03-10 21:43:20,918 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) [2021-03-10 21:43:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 98 transitions. [2021-03-10 21:43:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:43:20,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:20,920 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:21,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 21:43:21,131 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:21,132 INFO L82 PathProgramCache]: Analyzing trace with hash -976515612, now seen corresponding path program 5 times [2021-03-10 21:43:21,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:21,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082297750] [2021-03-10 21:43:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082297750] [2021-03-10 21:43:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125005704] [2021-03-10 21:43:21,290 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:21,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:43:21,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:21,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:21,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:21,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:43:21,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:21,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:43:21,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:21,476 INFO L628 ElimStorePlain]: treesize reduction 83, result has 11.7 percent of original size [2021-03-10 21:43:21,476 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:21,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-03-10 21:43:21,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-03-10 21:43:21,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:21,477 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-03-10 21:43:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:21,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:21,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683783573] [2021-03-10 21:43:21,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:21,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:21,497 INFO L87 Difference]: Start difference. First operand 47 states and 98 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) [2021-03-10 21:43:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:21,652 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2021-03-10 21:43:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:43:21,652 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 [2021-03-10 21:43:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:21,653 INFO L225 Difference]: With dead ends: 58 [2021-03-10 21:43:21,653 INFO L226 Difference]: Without dead ends: 55 [2021-03-10 21:43:21,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-03-10 21:43:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2021-03-10 21:43:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 98 transitions. [2021-03-10 21:43:21,655 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 98 transitions. Word has length 12 [2021-03-10 21:43:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:21,656 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 98 transitions. [2021-03-10 21:43:21,656 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) [2021-03-10 21:43:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 98 transitions. [2021-03-10 21:43:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:43:21,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:21,657 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:21,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:21,867 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -968785214, now seen corresponding path program 6 times [2021-03-10 21:43:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:21,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704168884] [2021-03-10 21:43:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704168884] [2021-03-10 21:43:21,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013624616] [2021-03-10 21:43:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:43:21,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:43:21,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:43:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:22,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:22,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:43:22,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:22,113 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 25 treesize of output 19 [2021-03-10 21:43:22,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,124 INFO L628 ElimStorePlain]: treesize reduction 77, result has 12.5 percent of original size [2021-03-10 21:43:22,124 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:43:22,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-03-10 21:43:22,124 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:22,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:107, output treesize:11 [2021-03-10 21:43:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:22,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:43:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691467129] [2021-03-10 21:43:22,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:22,137 INFO L87 Difference]: Start difference. First operand 47 states and 98 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2021-03-10 21:43:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:22,255 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-03-10 21:43:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:22,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 12 [2021-03-10 21:43:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:22,256 INFO L225 Difference]: With dead ends: 68 [2021-03-10 21:43:22,256 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:43:22,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:43:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-03-10 21:43:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-03-10 21:43:22,258 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 12 [2021-03-10 21:43:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:22,258 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-03-10 21:43:22,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2021-03-10 21:43:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-03-10 21:43:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:22,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:22,258 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:22,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:22,473 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:22,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1580118726, now seen corresponding path program 7 times [2021-03-10 21:43:22,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:22,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307453275] [2021-03-10 21:43:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307453275] [2021-03-10 21:43:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708397608] [2021-03-10 21:43:22,532 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 [2021-03-10 21:43:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:22,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:43:22,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:22,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:22,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:22,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:22,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:22,648 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:43:22,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:22,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:22,675 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-03-10 21:43:22,676 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:22,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:43:22,676 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-03-10 21:43:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:22,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140611295] [2021-03-10 21:43:22,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:22,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:22,700 INFO L87 Difference]: Start difference. First operand 46 states and 96 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) [2021-03-10 21:43:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:22,876 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-03-10 21:43:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:22,876 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 [2021-03-10 21:43:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:22,877 INFO L225 Difference]: With dead ends: 64 [2021-03-10 21:43:22,877 INFO L226 Difference]: Without dead ends: 57 [2021-03-10 21:43:22,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-03-10 21:43:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2021-03-10 21:43:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 90 transitions. [2021-03-10 21:43:22,878 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 90 transitions. Word has length 13 [2021-03-10 21:43:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:22,878 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 90 transitions. [2021-03-10 21:43:22,878 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) [2021-03-10 21:43:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 90 transitions. [2021-03-10 21:43:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:22,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:22,879 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:23,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-10 21:43:23,087 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash -4067700, now seen corresponding path program 8 times [2021-03-10 21:43:23,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:23,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320313139] [2021-03-10 21:43:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320313139] [2021-03-10 21:43:23,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591249894] [2021-03-10 21:43:23,133 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) [2021-03-10 21:43:23,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:23,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:23,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:23,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,252 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-03-10 21:43:23,252 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:23,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,253 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-03-10 21:43:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:23,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:23,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947577440] [2021-03-10 21:43:23,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:23,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:23,278 INFO L87 Difference]: Start difference. First operand 43 states and 90 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) [2021-03-10 21:43:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:23,365 INFO L93 Difference]: Finished difference Result 63 states and 126 transitions. [2021-03-10 21:43:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:23,366 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 [2021-03-10 21:43:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:23,366 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:43:23,366 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 21:43:23,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 21:43:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2021-03-10 21:43:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 93 transitions. [2021-03-10 21:43:23,368 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 93 transitions. Word has length 13 [2021-03-10 21:43:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:23,368 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 93 transitions. [2021-03-10 21:43:23,368 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) [2021-03-10 21:43:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 93 transitions. [2021-03-10 21:43:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:23,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:23,368 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:23,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:43:23,575 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1853476550, now seen corresponding path program 9 times [2021-03-10 21:43:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:23,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584045390] [2021-03-10 21:43:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584045390] [2021-03-10 21:43:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102722592] [2021-03-10 21:43:23,646 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) [2021-03-10 21:43:23,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:23,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:23,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:23,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:23,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:23,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:23,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:23,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:23,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:23,775 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:23,775 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:23,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:23,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:23,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:23,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607177415] [2021-03-10 21:43:23,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:23,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:23,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:23,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:23,819 INFO L87 Difference]: Start difference. First operand 44 states and 93 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) [2021-03-10 21:43:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:23,994 INFO L93 Difference]: Finished difference Result 102 states and 187 transitions. [2021-03-10 21:43:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:23,994 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 [2021-03-10 21:43:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:23,995 INFO L225 Difference]: With dead ends: 102 [2021-03-10 21:43:23,995 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:43:23,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:43:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 47. [2021-03-10 21:43:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 105 transitions. [2021-03-10 21:43:23,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 105 transitions. Word has length 13 [2021-03-10 21:43:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:23,997 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 105 transitions. [2021-03-10 21:43:23,997 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) [2021-03-10 21:43:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 105 transitions. [2021-03-10 21:43:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:23,997 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:23,997 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:24,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 21:43:24,211 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1051860322, now seen corresponding path program 10 times [2021-03-10 21:43:24,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:24,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369836160] [2021-03-10 21:43:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:24,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369836160] [2021-03-10 21:43:24,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454364747] [2021-03-10 21:43:24,274 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 [2021-03-10 21:43:24,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:24,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,351 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 [2021-03-10 21:43:24,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,355 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 16 treesize of output 12 [2021-03-10 21:43:24,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:24,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,359 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 [2021-03-10 21:43:24,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:24,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:24,363 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 [2021-03-10 21:43:24,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:24,394 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:24,394 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:24,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:24,395 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:24,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:24,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:24,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752600199] [2021-03-10 21:43:24,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:24,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:24,456 INFO L87 Difference]: Start difference. First operand 47 states and 105 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) [2021-03-10 21:43:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:24,954 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-03-10 21:43:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:43:24,954 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 [2021-03-10 21:43:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:24,955 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:43:24,955 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 21:43:24,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:43:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 21:43:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 49. [2021-03-10 21:43:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 48 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 107 transitions. [2021-03-10 21:43:24,957 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 107 transitions. Word has length 13 [2021-03-10 21:43:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:24,957 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 107 transitions. [2021-03-10 21:43:24,957 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) [2021-03-10 21:43:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 107 transitions. [2021-03-10 21:43:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:24,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:24,957 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:25,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:25,163 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 666483384, now seen corresponding path program 11 times [2021-03-10 21:43:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:25,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845920764] [2021-03-10 21:43:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845920764] [2021-03-10 21:43:25,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628379921] [2021-03-10 21:43:25,228 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:25,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:43:25,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:25,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:25,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:25,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,325 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 [2021-03-10 21:43:25,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:25,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:25,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:25,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:25,376 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:25,376 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:25,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:25,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:25,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414027927] [2021-03-10 21:43:25,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:25,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:25,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:25,418 INFO L87 Difference]: Start difference. First operand 49 states and 107 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) [2021-03-10 21:43:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:25,693 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-03-10 21:43:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:25,693 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 [2021-03-10 21:43:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:25,693 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:43:25,693 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 21:43:25,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 21:43:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2021-03-10 21:43:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-03-10 21:43:25,695 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-03-10 21:43:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:25,695 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-03-10 21:43:25,695 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) [2021-03-10 21:43:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-03-10 21:43:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:25,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:25,696 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:25,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 21:43:25,896 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1044129924, now seen corresponding path program 12 times [2021-03-10 21:43:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:25,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403950377] [2021-03-10 21:43:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403950377] [2021-03-10 21:43:25,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890370908] [2021-03-10 21:43:25,945 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 [2021-03-10 21:43:25,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:43:25,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:25,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:26,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,050 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 [2021-03-10 21:43:26,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,054 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 [2021-03-10 21:43:26,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,075 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:43:26,075 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:26,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,076 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:43:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:26,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:26,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:26,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092841290] [2021-03-10 21:43:26,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:26,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:26,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:26,094 INFO L87 Difference]: Start difference. First operand 48 states and 102 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) [2021-03-10 21:43:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:26,142 INFO L93 Difference]: Finished difference Result 72 states and 147 transitions. [2021-03-10 21:43:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:26,142 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 [2021-03-10 21:43:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:26,143 INFO L225 Difference]: With dead ends: 72 [2021-03-10 21:43:26,143 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 21:43:26,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 21:43:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-03-10 21:43:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-03-10 21:43:26,147 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-03-10 21:43:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:26,147 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-03-10 21:43:26,148 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) [2021-03-10 21:43:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-03-10 21:43:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:26,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:26,148 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:26,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:26,363 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:26,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1239139006, now seen corresponding path program 13 times [2021-03-10 21:43:26,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:26,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058625532] [2021-03-10 21:43:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:26,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058625532] [2021-03-10 21:43:26,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921091838] [2021-03-10 21:43:26,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:26,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:26,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:26,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:26,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,528 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:43:26,528 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:26,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:43:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:26,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:26,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:26,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397912299] [2021-03-10 21:43:26,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:26,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:26,550 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:26,630 INFO L93 Difference]: Finished difference Result 81 states and 162 transitions. [2021-03-10 21:43:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:26,630 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 [2021-03-10 21:43:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:26,630 INFO L225 Difference]: With dead ends: 81 [2021-03-10 21:43:26,630 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:43:26,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:43:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2021-03-10 21:43:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 54 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 124 transitions. [2021-03-10 21:43:26,632 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 124 transitions. Word has length 13 [2021-03-10 21:43:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:26,632 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 124 transitions. [2021-03-10 21:43:26,632 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) [2021-03-10 21:43:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 124 transitions. [2021-03-10 21:43:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:26,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:26,633 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:26,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:26,839 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash 319438298, now seen corresponding path program 14 times [2021-03-10 21:43:26,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:26,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350870888] [2021-03-10 21:43:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350870888] [2021-03-10 21:43:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973912827] [2021-03-10 21:43:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:26,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:26,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,968 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 17 treesize of output 13 [2021-03-10 21:43:26,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:43:26,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:26,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:26,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:26,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:43:26,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:26,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:27,007 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:43:27,008 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:27,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:43:27,008 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:43:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:27,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861637167] [2021-03-10 21:43:27,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:27,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:27,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:27,037 INFO L87 Difference]: Start difference. First operand 55 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:27,199 INFO L93 Difference]: Finished difference Result 74 states and 151 transitions. [2021-03-10 21:43:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:43:27,200 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 [2021-03-10 21:43:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:27,200 INFO L225 Difference]: With dead ends: 74 [2021-03-10 21:43:27,200 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 21:43:27,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 21:43:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-03-10 21:43:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 125 transitions. [2021-03-10 21:43:27,202 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 125 transitions. Word has length 13 [2021-03-10 21:43:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:27,202 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 125 transitions. [2021-03-10 21:43:27,202 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) [2021-03-10 21:43:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 125 transitions. [2021-03-10 21:43:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:27,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:27,202 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:27,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 21:43:27,415 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1246869404, now seen corresponding path program 15 times [2021-03-10 21:43:27,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:27,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790429487] [2021-03-10 21:43:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790429487] [2021-03-10 21:43:27,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731804189] [2021-03-10 21:43:27,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:27,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:27,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:27,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,555 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 17 treesize of output 13 [2021-03-10 21:43:27,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:27,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,561 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 16 treesize of output 12 [2021-03-10 21:43:27,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:27,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:27,569 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 16 treesize of output 12 [2021-03-10 21:43:27,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:27,600 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:27,600 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:27,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:27,601 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:27,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136533641] [2021-03-10 21:43:27,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:27,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:27,656 INFO L87 Difference]: Start difference. First operand 56 states and 125 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) [2021-03-10 21:43:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:27,789 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2021-03-10 21:43:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:27,789 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 [2021-03-10 21:43:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:27,790 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:43:27,790 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:43:27,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:43:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2021-03-10 21:43:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.240740740740741) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 121 transitions. [2021-03-10 21:43:27,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 121 transitions. Word has length 13 [2021-03-10 21:43:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:27,792 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 121 transitions. [2021-03-10 21:43:27,792 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) [2021-03-10 21:43:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 121 transitions. [2021-03-10 21:43:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:27,792 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:27,792 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:28,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:28,007 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2048485632, now seen corresponding path program 16 times [2021-03-10 21:43:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:28,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265166318] [2021-03-10 21:43:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265166318] [2021-03-10 21:43:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541379288] [2021-03-10 21:43:28,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:28,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:28,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:28,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:28,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,141 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 [2021-03-10 21:43:28,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:28,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,151 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 15 treesize of output 11 [2021-03-10 21:43:28,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:28,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,185 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:28,186 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:28,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:28,186 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:28,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:28,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321876737] [2021-03-10 21:43:28,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:28,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:28,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:28,259 INFO L87 Difference]: Start difference. First operand 55 states and 121 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) [2021-03-10 21:43:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:28,455 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-03-10 21:43:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:43:28,456 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 [2021-03-10 21:43:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:28,456 INFO L225 Difference]: With dead ends: 86 [2021-03-10 21:43:28,456 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 21:43:28,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 21:43:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-03-10 21:43:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 123 transitions. [2021-03-10 21:43:28,458 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 123 transitions. Word has length 13 [2021-03-10 21:43:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:28,458 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 123 transitions. [2021-03-10 21:43:28,458 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) [2021-03-10 21:43:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 123 transitions. [2021-03-10 21:43:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:28,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:28,458 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:28,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:28,663 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash -528137958, now seen corresponding path program 17 times [2021-03-10 21:43:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:28,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319043322] [2021-03-10 21:43:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319043322] [2021-03-10 21:43:28,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541917327] [2021-03-10 21:43:28,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:43:28,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:43:28,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:28,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,814 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 17 treesize of output 13 [2021-03-10 21:43:28,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:28,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,821 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 15 treesize of output 11 [2021-03-10 21:43:28,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:28,825 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 [2021-03-10 21:43:28,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:28,860 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:28,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:28,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:28,861 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:28,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:28,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697118752] [2021-03-10 21:43:28,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:28,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:28,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:28,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:28,908 INFO L87 Difference]: Start difference. First operand 56 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:29,046 INFO L93 Difference]: Finished difference Result 79 states and 161 transitions. [2021-03-10 21:43:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:29,046 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 [2021-03-10 21:43:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:29,046 INFO L225 Difference]: With dead ends: 79 [2021-03-10 21:43:29,046 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 21:43:29,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 21:43:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2021-03-10 21:43:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.169811320754717) internal successors, (115), 53 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) [2021-03-10 21:43:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 115 transitions. [2021-03-10 21:43:29,048 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 115 transitions. Word has length 13 [2021-03-10 21:43:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:29,048 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 115 transitions. [2021-03-10 21:43:29,048 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) [2021-03-10 21:43:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 115 transitions. [2021-03-10 21:43:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:29,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:29,049 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:29,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:43:29,252 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -242535592, now seen corresponding path program 18 times [2021-03-10 21:43:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:29,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157402100] [2021-03-10 21:43:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157402100] [2021-03-10 21:43:29,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489651611] [2021-03-10 21:43:29,304 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 [2021-03-10 21:43:29,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:43:29,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:29,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:29,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:29,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,374 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 [2021-03-10 21:43:29,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:29,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:29,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:29,381 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 [2021-03-10 21:43:29,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:29,412 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:29,412 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:29,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:29,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:29,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034718399] [2021-03-10 21:43:29,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:29,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:29,466 INFO L87 Difference]: Start difference. First operand 54 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) [2021-03-10 21:43:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:29,618 INFO L93 Difference]: Finished difference Result 96 states and 186 transitions. [2021-03-10 21:43:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:29,618 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 [2021-03-10 21:43:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:29,618 INFO L225 Difference]: With dead ends: 96 [2021-03-10 21:43:29,618 INFO L226 Difference]: Without dead ends: 96 [2021-03-10 21:43:29,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-10 21:43:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2021-03-10 21:43:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 126 transitions. [2021-03-10 21:43:29,620 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 126 transitions. Word has length 13 [2021-03-10 21:43:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:29,620 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 126 transitions. [2021-03-10 21:43:29,620 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) [2021-03-10 21:43:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 126 transitions. [2021-03-10 21:43:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:29,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:29,620 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:29,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:29,834 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 559080636, now seen corresponding path program 19 times [2021-03-10 21:43:29,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:29,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900012207] [2021-03-10 21:43:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900012207] [2021-03-10 21:43:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123532550] [2021-03-10 21:43:29,897 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 [2021-03-10 21:43:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:29,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:30,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,073 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 [2021-03-10 21:43:30,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:30,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:30,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:30,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,152 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:30,152 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:30,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:30,152 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:30,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:30,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729546582] [2021-03-10 21:43:30,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:30,212 INFO L87 Difference]: Start difference. First operand 57 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:30,500 INFO L93 Difference]: Finished difference Result 90 states and 175 transitions. [2021-03-10 21:43:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:43:30,511 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 [2021-03-10 21:43:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:30,512 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:43:30,512 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 21:43:30,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:43:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 21:43:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2021-03-10 21:43:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 130 transitions. [2021-03-10 21:43:30,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 130 transitions. Word has length 13 [2021-03-10 21:43:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:30,515 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 130 transitions. [2021-03-10 21:43:30,515 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) [2021-03-10 21:43:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 130 transitions. [2021-03-10 21:43:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:30,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:30,515 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:30,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:30,727 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2017542954, now seen corresponding path program 20 times [2021-03-10 21:43:30,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:30,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98880617] [2021-03-10 21:43:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98880617] [2021-03-10 21:43:30,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055563369] [2021-03-10 21:43:30,778 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 [2021-03-10 21:43:30,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:30,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:30,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:30,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:30,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:30,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:30,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:30,894 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:30,894 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:30,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:30,894 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:30,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:30,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796776308] [2021-03-10 21:43:30,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:30,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:30,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:30,951 INFO L87 Difference]: Start difference. First operand 59 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:31,182 INFO L93 Difference]: Finished difference Result 78 states and 163 transitions. [2021-03-10 21:43:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:31,183 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 [2021-03-10 21:43:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:31,183 INFO L225 Difference]: With dead ends: 78 [2021-03-10 21:43:31,183 INFO L226 Difference]: Without dead ends: 78 [2021-03-10 21:43:31,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-10 21:43:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-03-10 21:43:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 125 transitions. [2021-03-10 21:43:31,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 125 transitions. Word has length 13 [2021-03-10 21:43:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:31,185 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 125 transitions. [2021-03-10 21:43:31,185 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) [2021-03-10 21:43:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 125 transitions. [2021-03-10 21:43:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:31,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:31,185 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:31,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:31,386 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:31,386 INFO L82 PathProgramCache]: Analyzing trace with hash 566811034, now seen corresponding path program 21 times [2021-03-10 21:43:31,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:31,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905676302] [2021-03-10 21:43:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905676302] [2021-03-10 21:43:31,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717943311] [2021-03-10 21:43:31,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:31,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:31,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:31,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:31,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:31,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:31,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:31,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:31,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:31,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:31,553 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:43:31,553 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:31,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:31,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:43:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:31,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408246534] [2021-03-10 21:43:31,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:31,571 INFO L87 Difference]: Start difference. First operand 58 states and 125 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) [2021-03-10 21:43:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:31,634 INFO L93 Difference]: Finished difference Result 78 states and 163 transitions. [2021-03-10 21:43:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:31,634 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 [2021-03-10 21:43:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:31,635 INFO L225 Difference]: With dead ends: 78 [2021-03-10 21:43:31,635 INFO L226 Difference]: Without dead ends: 78 [2021-03-10 21:43:31,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:31,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-10 21:43:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-03-10 21:43:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 125 transitions. [2021-03-10 21:43:31,636 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 125 transitions. Word has length 13 [2021-03-10 21:43:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:31,636 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 125 transitions. [2021-03-10 21:43:31,636 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) [2021-03-10 21:43:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 125 transitions. [2021-03-10 21:43:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:31,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:31,637 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:31,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:31,839 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1546997946, now seen corresponding path program 22 times [2021-03-10 21:43:31,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:31,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696588874] [2021-03-10 21:43:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696588874] [2021-03-10 21:43:31,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491401566] [2021-03-10 21:43:31,927 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 [2021-03-10 21:43:31,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:32,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:32,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:32,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,003 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 15 treesize of output 11 [2021-03-10 21:43:32,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,022 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-03-10 21:43:32,022 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:32,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-03-10 21:43:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:32,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:32,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:32,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117102209] [2021-03-10 21:43:32,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:32,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:32,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:32,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:32,039 INFO L87 Difference]: Start difference. First operand 58 states and 125 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) [2021-03-10 21:43:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:32,120 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2021-03-10 21:43:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:32,120 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 [2021-03-10 21:43:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:32,121 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:43:32,121 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 21:43:32,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 21:43:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2021-03-10 21:43:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 124 transitions. [2021-03-10 21:43:32,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 124 transitions. Word has length 13 [2021-03-10 21:43:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:32,123 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 124 transitions. [2021-03-10 21:43:32,123 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) [2021-03-10 21:43:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 124 transitions. [2021-03-10 21:43:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:32,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:32,123 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:32,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 21:43:32,328 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1390433762, now seen corresponding path program 23 times [2021-03-10 21:43:32,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:32,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939114528] [2021-03-10 21:43:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939114528] [2021-03-10 21:43:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605988785] [2021-03-10 21:43:32,396 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) [2021-03-10 21:43:32,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:32,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,482 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 [2021-03-10 21:43:32,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:43:32,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,488 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 [2021-03-10 21:43:32,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:32,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:32,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,495 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 16 treesize of output 12 [2021-03-10 21:43:32,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,519 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-03-10 21:43:32,520 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:32,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:43:32,520 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-03-10 21:43:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:32,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:32,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:32,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946847524] [2021-03-10 21:43:32,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:32,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:32,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:32,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:32,543 INFO L87 Difference]: Start difference. First operand 57 states and 124 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) [2021-03-10 21:43:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:32,722 INFO L93 Difference]: Finished difference Result 88 states and 183 transitions. [2021-03-10 21:43:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:32,722 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 [2021-03-10 21:43:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:32,722 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:43:32,722 INFO L226 Difference]: Without dead ends: 85 [2021-03-10 21:43:32,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-10 21:43:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 57. [2021-03-10 21:43:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2021-03-10 21:43:32,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 13 [2021-03-10 21:43:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:32,732 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2021-03-10 21:43:32,732 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) [2021-03-10 21:43:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2021-03-10 21:43:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:32,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:32,732 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:32,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 21:43:32,939 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378020, now seen corresponding path program 24 times [2021-03-10 21:43:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:32,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517148410] [2021-03-10 21:43:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517148410] [2021-03-10 21:43:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516872998] [2021-03-10 21:43:32,985 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) [2021-03-10 21:43:33,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:33,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:33,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,120 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:43:33,121 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:33,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:43:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:33,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097864581] [2021-03-10 21:43:33,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:33,138 INFO L87 Difference]: Start difference. First operand 57 states and 123 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) [2021-03-10 21:43:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:33,213 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2021-03-10 21:43:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:33,213 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 [2021-03-10 21:43:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:33,213 INFO L225 Difference]: With dead ends: 91 [2021-03-10 21:43:33,213 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:43:33,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:43:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2021-03-10 21:43:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 126 transitions. [2021-03-10 21:43:33,215 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 126 transitions. Word has length 13 [2021-03-10 21:43:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:33,215 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 126 transitions. [2021-03-10 21:43:33,216 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) [2021-03-10 21:43:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 126 transitions. [2021-03-10 21:43:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:33,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:33,216 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:33,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:33,427 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:33,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1961888568, now seen corresponding path program 25 times [2021-03-10 21:43:33,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:33,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463140525] [2021-03-10 21:43:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463140525] [2021-03-10 21:43:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531625981] [2021-03-10 21:43:33,472 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 [2021-03-10 21:43:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:33,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:33,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:43:33,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:43:33,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,592 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 17 treesize of output 13 [2021-03-10 21:43:33,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:33,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:33,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:33,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:33,627 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:43:33,627 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:33,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:43:33,643 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:43:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:33,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377599294] [2021-03-10 21:43:33,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:33,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:33,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:33,664 INFO L87 Difference]: Start difference. First operand 58 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:33,913 INFO L93 Difference]: Finished difference Result 90 states and 187 transitions. [2021-03-10 21:43:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:33,913 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 [2021-03-10 21:43:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:33,914 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:43:33,914 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 21:43:33,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 21:43:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-03-10 21:43:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 125 transitions. [2021-03-10 21:43:33,915 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 125 transitions. Word has length 13 [2021-03-10 21:43:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:33,916 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 125 transitions. [2021-03-10 21:43:33,916 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) [2021-03-10 21:43:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 125 transitions. [2021-03-10 21:43:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:33,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:33,916 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:34,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:43:34,117 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1405647622, now seen corresponding path program 26 times [2021-03-10 21:43:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:34,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780179555] [2021-03-10 21:43:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780179555] [2021-03-10 21:43:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337816808] [2021-03-10 21:43:34,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:43:34,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:34,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:34,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:34,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:34,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:34,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:34,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,294 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:34,294 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:34,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:34,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:34,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:34,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:34,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050627907] [2021-03-10 21:43:34,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:34,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:34,335 INFO L87 Difference]: Start difference. First operand 58 states and 125 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) [2021-03-10 21:43:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:34,580 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-03-10 21:43:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:34,580 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 [2021-03-10 21:43:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:34,580 INFO L225 Difference]: With dead ends: 130 [2021-03-10 21:43:34,580 INFO L226 Difference]: Without dead ends: 130 [2021-03-10 21:43:34,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-03-10 21:43:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 61. [2021-03-10 21:43:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 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) [2021-03-10 21:43:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 136 transitions. [2021-03-10 21:43:34,582 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 136 transitions. Word has length 13 [2021-03-10 21:43:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:34,582 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 136 transitions. [2021-03-10 21:43:34,582 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) [2021-03-10 21:43:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 136 transitions. [2021-03-10 21:43:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:34,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:34,583 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:34,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:34,798 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash -604031394, now seen corresponding path program 27 times [2021-03-10 21:43:34,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:34,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466585650] [2021-03-10 21:43:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:34,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466585650] [2021-03-10 21:43:34,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840351393] [2021-03-10 21:43:34,851 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 [2021-03-10 21:43:34,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:34,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:34,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:34,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:34,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,937 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 [2021-03-10 21:43:34,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:34,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:34,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:34,976 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:34,976 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:34,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:34,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:35,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222671868] [2021-03-10 21:43:35,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:35,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:35,033 INFO L87 Difference]: Start difference. First operand 61 states and 136 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) [2021-03-10 21:43:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:35,537 INFO L93 Difference]: Finished difference Result 123 states and 240 transitions. [2021-03-10 21:43:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:43:35,537 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 [2021-03-10 21:43:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:35,537 INFO L225 Difference]: With dead ends: 123 [2021-03-10 21:43:35,537 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:43:35,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:43:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:43:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 62. [2021-03-10 21:43:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 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) [2021-03-10 21:43:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 138 transitions. [2021-03-10 21:43:35,539 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 138 transitions. Word has length 13 [2021-03-10 21:43:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:35,539 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 138 transitions. [2021-03-10 21:43:35,539 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) [2021-03-10 21:43:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 138 transitions. [2021-03-10 21:43:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:35,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:35,540 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:35,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:43:35,740 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1114312312, now seen corresponding path program 28 times [2021-03-10 21:43:35,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:35,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790047998] [2021-03-10 21:43:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790047998] [2021-03-10 21:43:35,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798005550] [2021-03-10 21:43:35,789 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 [2021-03-10 21:43:35,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:35,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:35,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:35,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,863 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 16 treesize of output 12 [2021-03-10 21:43:35,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:35,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:35,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,871 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 15 treesize of output 11 [2021-03-10 21:43:35,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:35,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:35,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:35,912 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:35,913 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:35,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:35,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:35,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:35,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638288672] [2021-03-10 21:43:35,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:35,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:35,961 INFO L87 Difference]: Start difference. First operand 62 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) [2021-03-10 21:43:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:36,230 INFO L93 Difference]: Finished difference Result 113 states and 225 transitions. [2021-03-10 21:43:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:36,230 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 [2021-03-10 21:43:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:36,231 INFO L225 Difference]: With dead ends: 113 [2021-03-10 21:43:36,231 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 21:43:36,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 21:43:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 60. [2021-03-10 21:43:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-03-10 21:43:36,232 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 13 [2021-03-10 21:43:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:36,232 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-03-10 21:43:36,233 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) [2021-03-10 21:43:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-03-10 21:43:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:36,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:36,233 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:36,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 21:43:36,447 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash 732792740, now seen corresponding path program 29 times [2021-03-10 21:43:36,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:36,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75522298] [2021-03-10 21:43:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75522298] [2021-03-10 21:43:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512653822] [2021-03-10 21:43:36,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:36,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:36,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:36,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:36,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:36,580 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 [2021-03-10 21:43:36,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:36,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:36,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:36,603 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:43:36,603 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:36,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:36,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:43:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:36,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:36,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484911475] [2021-03-10 21:43:36,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:36,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:36,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:36,621 INFO L87 Difference]: Start difference. First operand 60 states and 130 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) [2021-03-10 21:43:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:36,712 INFO L93 Difference]: Finished difference Result 94 states and 189 transitions. [2021-03-10 21:43:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:36,712 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 [2021-03-10 21:43:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:36,712 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:43:36,713 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:43:36,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:43:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-03-10 21:43:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 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) [2021-03-10 21:43:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 140 transitions. [2021-03-10 21:43:36,714 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 140 transitions. Word has length 13 [2021-03-10 21:43:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:36,714 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 140 transitions. [2021-03-10 21:43:36,714 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) [2021-03-10 21:43:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 140 transitions. [2021-03-10 21:43:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:36,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:36,715 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:36,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:36,923 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash -186907968, now seen corresponding path program 30 times [2021-03-10 21:43:36,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:36,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658919957] [2021-03-10 21:43:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:36,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658919957] [2021-03-10 21:43:36,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928383422] [2021-03-10 21:43:36,965 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) [2021-03-10 21:43:36,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:36,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:37,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:43:37,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:43:37,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:43:37,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:37,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:37,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,091 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 [2021-03-10 21:43:37,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,120 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:43:37,121 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:37,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:43:37,122 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:43:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:37,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394078358] [2021-03-10 21:43:37,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:37,145 INFO L87 Difference]: Start difference. First operand 63 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) [2021-03-10 21:43:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:37,366 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-03-10 21:43:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:43:37,366 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 [2021-03-10 21:43:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:37,367 INFO L225 Difference]: With dead ends: 83 [2021-03-10 21:43:37,367 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:43:37,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:43:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-03-10 21:43:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.238095238095238) internal successors, (141), 63 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 141 transitions. [2021-03-10 21:43:37,375 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 141 transitions. Word has length 13 [2021-03-10 21:43:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:37,375 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 141 transitions. [2021-03-10 21:43:37,375 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) [2021-03-10 21:43:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 141 transitions. [2021-03-10 21:43:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:37,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:37,376 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:37,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-03-10 21:43:37,579 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash 740523138, now seen corresponding path program 31 times [2021-03-10 21:43:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:37,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927324509] [2021-03-10 21:43:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927324509] [2021-03-10 21:43:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543842652] [2021-03-10 21:43:37,626 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 [2021-03-10 21:43:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:37,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:37,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,694 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 16 treesize of output 12 [2021-03-10 21:43:37,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:37,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:37,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:37,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:37,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:37,739 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:37,739 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:37,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:37,739 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:37,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:37,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768398641] [2021-03-10 21:43:37,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:37,779 INFO L87 Difference]: Start difference. First operand 64 states and 141 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) [2021-03-10 21:43:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:37,956 INFO L93 Difference]: Finished difference Result 108 states and 204 transitions. [2021-03-10 21:43:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:37,956 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 [2021-03-10 21:43:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:37,956 INFO L225 Difference]: With dead ends: 108 [2021-03-10 21:43:37,956 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 21:43:37,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 21:43:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 62. [2021-03-10 21:43:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 61 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) [2021-03-10 21:43:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 136 transitions. [2021-03-10 21:43:37,958 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 136 transitions. Word has length 13 [2021-03-10 21:43:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:37,958 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 136 transitions. [2021-03-10 21:43:37,958 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) [2021-03-10 21:43:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 136 transitions. [2021-03-10 21:43:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:37,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:37,959 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:38,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:38,171 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1542139366, now seen corresponding path program 32 times [2021-03-10 21:43:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:38,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244664359] [2021-03-10 21:43:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244664359] [2021-03-10 21:43:38,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245217986] [2021-03-10 21:43:38,213 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 [2021-03-10 21:43:38,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:38,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:38,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,290 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 16 treesize of output 12 [2021-03-10 21:43:38,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:38,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,298 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 [2021-03-10 21:43:38,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:38,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,333 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:38,333 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:38,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:38,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:38,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:38,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851820717] [2021-03-10 21:43:38,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:38,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:38,386 INFO L87 Difference]: Start difference. First operand 62 states and 136 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) [2021-03-10 21:43:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:38,586 INFO L93 Difference]: Finished difference Result 90 states and 175 transitions. [2021-03-10 21:43:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:43:38,586 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 [2021-03-10 21:43:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:38,587 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:43:38,587 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 21:43:38,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 21:43:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-03-10 21:43:38,588 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) [2021-03-10 21:43:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 138 transitions. [2021-03-10 21:43:38,588 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 138 transitions. Word has length 13 [2021-03-10 21:43:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:38,588 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 138 transitions. [2021-03-10 21:43:38,588 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) [2021-03-10 21:43:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 138 transitions. [2021-03-10 21:43:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:38,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:38,589 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:38,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 21:43:38,799 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1034484224, now seen corresponding path program 33 times [2021-03-10 21:43:38,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:38,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847184917] [2021-03-10 21:43:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847184917] [2021-03-10 21:43:38,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763706205] [2021-03-10 21:43:38,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:43:38,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:38,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,924 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 16 treesize of output 12 [2021-03-10 21:43:38,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,927 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 [2021-03-10 21:43:38,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:38,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:38,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:38,965 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:38,965 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:38,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:38,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:39,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:39,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870705829] [2021-03-10 21:43:39,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:39,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:39,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:39,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:39,007 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) [2021-03-10 21:43:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:39,132 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-03-10 21:43:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:39,132 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 [2021-03-10 21:43:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:39,133 INFO L225 Difference]: With dead ends: 83 [2021-03-10 21:43:39,133 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 21:43:39,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 21:43:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2021-03-10 21:43:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 57 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 123 transitions. [2021-03-10 21:43:39,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 123 transitions. Word has length 13 [2021-03-10 21:43:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:39,134 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 123 transitions. [2021-03-10 21:43:39,134 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) [2021-03-10 21:43:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 123 transitions. [2021-03-10 21:43:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:39,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:39,135 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:39,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-03-10 21:43:39,347 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash -748881858, now seen corresponding path program 34 times [2021-03-10 21:43:39,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:39,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724852114] [2021-03-10 21:43:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724852114] [2021-03-10 21:43:39,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578721609] [2021-03-10 21:43:39,398 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 [2021-03-10 21:43:39,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:39,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:39,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:39,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:39,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:39,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,461 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 [2021-03-10 21:43:39,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:39,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:39,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:39,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:39,498 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:39,499 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:39,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:39,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:39,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:39,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518257660] [2021-03-10 21:43:39,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:39,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:39,541 INFO L87 Difference]: Start difference. First operand 58 states and 123 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) [2021-03-10 21:43:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:39,665 INFO L93 Difference]: Finished difference Result 100 states and 188 transitions. [2021-03-10 21:43:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:39,665 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 [2021-03-10 21:43:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:39,666 INFO L225 Difference]: With dead ends: 100 [2021-03-10 21:43:39,666 INFO L226 Difference]: Without dead ends: 100 [2021-03-10 21:43:39,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-10 21:43:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2021-03-10 21:43:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 57 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 123 transitions. [2021-03-10 21:43:39,667 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 123 transitions. Word has length 13 [2021-03-10 21:43:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:39,667 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 123 transitions. [2021-03-10 21:43:39,667 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) [2021-03-10 21:43:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 123 transitions. [2021-03-10 21:43:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:39,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:39,668 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:39,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-10 21:43:39,875 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash 52734370, now seen corresponding path program 35 times [2021-03-10 21:43:39,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:39,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57652378] [2021-03-10 21:43:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57652378] [2021-03-10 21:43:39,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295558417] [2021-03-10 21:43:39,927 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 [2021-03-10 21:43:39,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:43:39,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:39,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,990 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 16 treesize of output 12 [2021-03-10 21:43:39,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,994 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 [2021-03-10 21:43:39,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:39,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:39,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:39,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:40,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:40,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:40,032 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:40,032 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:40,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:40,032 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:40,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:40,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232681992] [2021-03-10 21:43:40,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:40,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:40,085 INFO L87 Difference]: Start difference. First operand 58 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:40,340 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-03-10 21:43:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:43:40,340 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 [2021-03-10 21:43:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:40,340 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:43:40,340 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 21:43:40,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:43:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 21:43:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2021-03-10 21:43:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 127 transitions. [2021-03-10 21:43:40,342 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 127 transitions. Word has length 13 [2021-03-10 21:43:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:40,342 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 127 transitions. [2021-03-10 21:43:40,342 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) [2021-03-10 21:43:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 127 transitions. [2021-03-10 21:43:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:40,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:40,342 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:40,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-03-10 21:43:40,555 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1771078076, now seen corresponding path program 36 times [2021-03-10 21:43:40,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:40,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312625747] [2021-03-10 21:43:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312625747] [2021-03-10 21:43:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201276513] [2021-03-10 21:43:40,602 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 [2021-03-10 21:43:40,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:43:40,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:40,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:40,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:40,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:40,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:40,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:40,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:40,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:40,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:43:40,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:40,720 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:43:40,720 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:40,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:40,721 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:43:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:40,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:40,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906487574] [2021-03-10 21:43:40,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:40,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:40,761 INFO L87 Difference]: Start difference. First operand 60 states and 127 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) [2021-03-10 21:43:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:40,906 INFO L93 Difference]: Finished difference Result 76 states and 153 transitions. [2021-03-10 21:43:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:40,907 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 [2021-03-10 21:43:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:40,907 INFO L225 Difference]: With dead ends: 76 [2021-03-10 21:43:40,907 INFO L226 Difference]: Without dead ends: 76 [2021-03-10 21:43:40,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-10 21:43:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-03-10 21:43:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-03-10 21:43:40,908 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 13 [2021-03-10 21:43:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:40,908 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-03-10 21:43:40,908 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) [2021-03-10 21:43:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-03-10 21:43:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:43:40,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:40,909 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:41,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:41,123 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:41,123 INFO L82 PathProgramCache]: Analyzing trace with hash 60464768, now seen corresponding path program 37 times [2021-03-10 21:43:41,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:41,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577927125] [2021-03-10 21:43:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577927125] [2021-03-10 21:43:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811016269] [2021-03-10 21:43:41,168 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 [2021-03-10 21:43:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:41,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:43:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:41,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:41,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:43:41,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:41,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:41,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:43:41,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:41,260 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:43:41,260 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:41,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:41,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:43:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:41,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893144035] [2021-03-10 21:43:41,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:41,279 INFO L87 Difference]: Start difference. First operand 57 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:41,348 INFO L93 Difference]: Finished difference Result 76 states and 153 transitions. [2021-03-10 21:43:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:41,349 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 [2021-03-10 21:43:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:41,349 INFO L225 Difference]: With dead ends: 76 [2021-03-10 21:43:41,349 INFO L226 Difference]: Without dead ends: 76 [2021-03-10 21:43:41,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-10 21:43:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2021-03-10 21:43:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 105 transitions. [2021-03-10 21:43:41,350 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 105 transitions. Word has length 13 [2021-03-10 21:43:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:41,350 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 105 transitions. [2021-03-10 21:43:41,350 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) [2021-03-10 21:43:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 105 transitions. [2021-03-10 21:43:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:41,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:41,351 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:41,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 21:43:41,551 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:41,552 INFO L82 PathProgramCache]: Analyzing trace with hash -127183706, now seen corresponding path program 38 times [2021-03-10 21:43:41,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:41,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520262567] [2021-03-10 21:43:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520262567] [2021-03-10 21:43:41,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262932946] [2021-03-10 21:43:41,797 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 [2021-03-10 21:43:41,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:42,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:42,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:42,133 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 [2021-03-10 21:43:42,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:42,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:42,140 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 [2021-03-10 21:43:42,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:42,153 INFO L628 ElimStorePlain]: treesize reduction 94, result has 10.5 percent of original size [2021-03-10 21:43:42,153 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:42,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-03-10 21:43:42,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-03-10 21:43:42,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:42,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:42,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:42,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:43:42,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197819126] [2021-03-10 21:43:42,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:43:42,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:43:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:42,174 INFO L87 Difference]: Start difference. First operand 52 states and 105 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) [2021-03-10 21:43:42,671 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-03-10 21:43:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:42,850 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-03-10 21:43:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:42,851 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 [2021-03-10 21:43:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:42,851 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:43:42,851 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:43:42,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:43:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:43:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-03-10 21:43:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2021-03-10 21:43:42,853 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 14 [2021-03-10 21:43:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:42,853 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2021-03-10 21:43:42,853 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) [2021-03-10 21:43:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2021-03-10 21:43:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:42,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:42,853 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:43,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:43,063 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1602893270, now seen corresponding path program 39 times [2021-03-10 21:43:43,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:43,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106145363] [2021-03-10 21:43:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106145363] [2021-03-10 21:43:43,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935193254] [2021-03-10 21:43:43,197 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 [2021-03-10 21:43:43,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:43,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:43,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:43,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:43,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:43,496 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 [2021-03-10 21:43:43,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:43,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:43,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:43,503 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 [2021-03-10 21:43:43,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:43,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:43,507 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 [2021-03-10 21:43:43,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:43,519 INFO L628 ElimStorePlain]: treesize reduction 68, result has 13.9 percent of original size [2021-03-10 21:43:43,520 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:43,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:43,520 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-03-10 21:43:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:43,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:43:43,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243802827] [2021-03-10 21:43:43,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:43:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:43:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:43,541 INFO L87 Difference]: Start difference. First operand 62 states and 128 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) [2021-03-10 21:43:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:44,047 INFO L93 Difference]: Finished difference Result 124 states and 244 transitions. [2021-03-10 21:43:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:43:44,048 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 [2021-03-10 21:43:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:44,048 INFO L225 Difference]: With dead ends: 124 [2021-03-10 21:43:44,048 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:43:44,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:43:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:43:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2021-03-10 21:43:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.269230769230769) internal successors, (177), 78 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 177 transitions. [2021-03-10 21:43:44,050 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 177 transitions. Word has length 14 [2021-03-10 21:43:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:44,050 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 177 transitions. [2021-03-10 21:43:44,050 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) [2021-03-10 21:43:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 177 transitions. [2021-03-10 21:43:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:44,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:44,050 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:44,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:44,265 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1595162872, now seen corresponding path program 40 times [2021-03-10 21:43:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:44,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724692218] [2021-03-10 21:43:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:44,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724692218] [2021-03-10 21:43:44,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27421757] [2021-03-10 21:43:44,391 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 [2021-03-10 21:43:44,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:44,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:44,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:44,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:44,717 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 [2021-03-10 21:43:44,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:44,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:44,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:44,724 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 [2021-03-10 21:43:44,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:44,739 INFO L628 ElimStorePlain]: treesize reduction 84, result has 11.6 percent of original size [2021-03-10 21:43:44,739 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:44,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-03-10 21:43:44,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_29 vanished before elimination [2021-03-10 21:43:44,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:44,739 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:44,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:43:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421883923] [2021-03-10 21:43:44,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:44,761 INFO L87 Difference]: Start difference. First operand 79 states and 177 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) [2021-03-10 21:43:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:45,202 INFO L93 Difference]: Finished difference Result 115 states and 242 transitions. [2021-03-10 21:43:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:45,203 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 [2021-03-10 21:43:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:45,203 INFO L225 Difference]: With dead ends: 115 [2021-03-10 21:43:45,203 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 21:43:45,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:43:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 21:43:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2021-03-10 21:43:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 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) [2021-03-10 21:43:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-03-10 21:43:45,205 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 14 [2021-03-10 21:43:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:45,205 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-03-10 21:43:45,205 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) [2021-03-10 21:43:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-03-10 21:43:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:45,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:45,206 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:45,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-03-10 21:43:45,406 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1210399428, now seen corresponding path program 41 times [2021-03-10 21:43:45,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:45,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386500029] [2021-03-10 21:43:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:45,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386500029] [2021-03-10 21:43:45,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633131329] [2021-03-10 21:43:45,765 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 [2021-03-10 21:43:45,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:43:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:46,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:46,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:46,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:46,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:46,038 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 [2021-03-10 21:43:46,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:46,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:46,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:46,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-03-10 21:43:46,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:46,080 INFO L628 ElimStorePlain]: treesize reduction 69, result has 46.5 percent of original size [2021-03-10 21:43:46,080 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:46,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:46,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-03-10 21:43:46,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:46,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:46,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:46,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:43:46,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:46,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:46,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:46,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:169, output treesize:22 [2021-03-10 21:43:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:46,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:46,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:43:46,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942950247] [2021-03-10 21:43:46,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:43:46,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:43:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:46,141 INFO L87 Difference]: Start difference. First operand 84 states and 192 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) [2021-03-10 21:43:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:46,693 INFO L93 Difference]: Finished difference Result 103 states and 229 transitions. [2021-03-10 21:43:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:46,694 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 [2021-03-10 21:43:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:46,694 INFO L225 Difference]: With dead ends: 103 [2021-03-10 21:43:46,694 INFO L226 Difference]: Without dead ends: 100 [2021-03-10 21:43:46,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:43:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-10 21:43:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-03-10 21:43:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 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) [2021-03-10 21:43:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-03-10 21:43:46,709 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 14 [2021-03-10 21:43:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:46,709 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-03-10 21:43:46,709 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) [2021-03-10 21:43:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-03-10 21:43:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:46,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:46,709 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:46,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:46,910 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -221091546, now seen corresponding path program 42 times [2021-03-10 21:43:46,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:46,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240967794] [2021-03-10 21:43:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:47,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240967794] [2021-03-10 21:43:47,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434725816] [2021-03-10 21:43:47,228 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 [2021-03-10 21:43:47,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:47,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:47,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:47,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:47,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,471 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 [2021-03-10 21:43:47,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:47,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-03-10 21:43:47,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:47,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-03-10 21:43:47,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:47,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:47,491 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 [2021-03-10 21:43:47,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:47,507 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-03-10 21:43:47,508 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:47,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:47,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-03-10 21:43:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:43:47,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398656713] [2021-03-10 21:43:47,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:43:47,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:43:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:47,534 INFO L87 Difference]: Start difference. First operand 84 states and 192 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) [2021-03-10 21:43:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:47,955 INFO L93 Difference]: Finished difference Result 97 states and 217 transitions. [2021-03-10 21:43:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:43:47,956 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 [2021-03-10 21:43:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:47,956 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:43:47,956 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:43:47,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:43:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:43:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-03-10 21:43:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.313953488372093) internal successors, (199), 86 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 199 transitions. [2021-03-10 21:43:47,958 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 199 transitions. Word has length 14 [2021-03-10 21:43:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:47,958 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 199 transitions. [2021-03-10 21:43:47,958 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) [2021-03-10 21:43:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 199 transitions. [2021-03-10 21:43:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:47,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:47,958 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:48,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-03-10 21:43:48,159 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 26281190, now seen corresponding path program 43 times [2021-03-10 21:43:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:48,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798079956] [2021-03-10 21:43:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798079956] [2021-03-10 21:43:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832176880] [2021-03-10 21:43:48,384 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 [2021-03-10 21:43:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:48,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:48,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:48,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:48,721 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 [2021-03-10 21:43:48,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:48,740 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-03-10 21:43:48,740 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:48,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-03-10 21:43:48,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-03-10 21:43:48,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:48,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:48,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:43:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231988914] [2021-03-10 21:43:48,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:43:48,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:43:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:48,769 INFO L87 Difference]: Start difference. First operand 87 states and 199 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) [2021-03-10 21:43:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:49,230 INFO L93 Difference]: Finished difference Result 110 states and 241 transitions. [2021-03-10 21:43:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:49,231 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 [2021-03-10 21:43:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:49,231 INFO L225 Difference]: With dead ends: 110 [2021-03-10 21:43:49,231 INFO L226 Difference]: Without dead ends: 104 [2021-03-10 21:43:49,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:43:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-03-10 21:43:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2021-03-10 21:43:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.3333333333333335) internal successors, (203), 87 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 203 transitions. [2021-03-10 21:43:49,245 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 203 transitions. Word has length 14 [2021-03-10 21:43:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:49,245 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 203 transitions. [2021-03-10 21:43:49,245 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) [2021-03-10 21:43:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 203 transitions. [2021-03-10 21:43:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:49,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:49,246 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:49,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:49,451 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash -390038426, now seen corresponding path program 44 times [2021-03-10 21:43:49,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:49,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220022482] [2021-03-10 21:43:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:49,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220022482] [2021-03-10 21:43:49,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703495381] [2021-03-10 21:43:49,830 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 [2021-03-10 21:43:49,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:49,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:50,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:50,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:50,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:50,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:50,105 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 [2021-03-10 21:43:50,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:50,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:50,111 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 [2021-03-10 21:43:50,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:50,124 INFO L628 ElimStorePlain]: treesize reduction 94, result has 10.5 percent of original size [2021-03-10 21:43:50,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_43 vanished before elimination [2021-03-10 21:43:50,124 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:50,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-03-10 21:43:50,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:50,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:50,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:43:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211600473] [2021-03-10 21:43:50,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:43:50,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:43:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:50,151 INFO L87 Difference]: Start difference. First operand 88 states and 203 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) [2021-03-10 21:43:50,664 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-10 21:43:50,991 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-10 21:43:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:51,008 INFO L93 Difference]: Finished difference Result 121 states and 262 transitions. [2021-03-10 21:43:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:51,009 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 [2021-03-10 21:43:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:51,009 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:43:51,009 INFO L226 Difference]: Without dead ends: 115 [2021-03-10 21:43:51,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1161.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:43:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-03-10 21:43:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-03-10 21:43:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.3666666666666667) internal successors, (213), 90 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 213 transitions. [2021-03-10 21:43:51,011 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 213 transitions. Word has length 14 [2021-03-10 21:43:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:51,011 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 213 transitions. [2021-03-10 21:43:51,011 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) [2021-03-10 21:43:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 213 transitions. [2021-03-10 21:43:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:51,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:51,012 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:51,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-03-10 21:43:51,212 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash 732601002, now seen corresponding path program 45 times [2021-03-10 21:43:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:51,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162099655] [2021-03-10 21:43:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:51,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162099655] [2021-03-10 21:43:51,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825400393] [2021-03-10 21:43:51,447 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 [2021-03-10 21:43:51,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:51,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:51,751 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 [2021-03-10 21:43:51,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:51,769 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-03-10 21:43:51,769 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:51,769 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-03-10 21:43:51,769 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-03-10 21:43:51,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:51,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:43:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560996656] [2021-03-10 21:43:51,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:43:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:43:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:51,792 INFO L87 Difference]: Start difference. First operand 91 states and 213 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) [2021-03-10 21:43:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:52,370 INFO L93 Difference]: Finished difference Result 141 states and 322 transitions. [2021-03-10 21:43:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:43:52,371 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 [2021-03-10 21:43:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:52,371 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:43:52,371 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 21:43:52,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 783.8ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:43:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 21:43:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2021-03-10 21:43:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.358695652173913) internal successors, (217), 92 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 217 transitions. [2021-03-10 21:43:52,373 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 217 transitions. Word has length 14 [2021-03-10 21:43:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:52,373 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 217 transitions. [2021-03-10 21:43:52,373 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) [2021-03-10 21:43:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 217 transitions. [2021-03-10 21:43:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:52,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:52,374 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:52,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-03-10 21:43:52,588 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash -844740728, now seen corresponding path program 46 times [2021-03-10 21:43:52,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:52,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087472877] [2021-03-10 21:43:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087472877] [2021-03-10 21:43:52,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688250736] [2021-03-10 21:43:52,932 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 [2021-03-10 21:43:52,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:53,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:53,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:53,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-03-10 21:43:53,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:53,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:53,285 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 [2021-03-10 21:43:53,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:53,325 INFO L628 ElimStorePlain]: treesize reduction 73, result has 48.2 percent of original size [2021-03-10 21:43:53,326 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:53,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:53,329 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 [2021-03-10 21:43:53,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:53,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:53,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:53,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-03-10 21:43:53,345 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:43:53,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:53,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:53,357 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:177, output treesize:22 [2021-03-10 21:43:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:53,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:53,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:43:53,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762693920] [2021-03-10 21:43:53,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:43:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:43:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:53,389 INFO L87 Difference]: Start difference. First operand 93 states and 217 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) [2021-03-10 21:43:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:53,995 INFO L93 Difference]: Finished difference Result 116 states and 263 transitions. [2021-03-10 21:43:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:53,995 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 [2021-03-10 21:43:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:53,995 INFO L225 Difference]: With dead ends: 116 [2021-03-10 21:43:53,995 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 21:43:53,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 915.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:43:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 21:43:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-03-10 21:43:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.358695652173913) internal successors, (217), 92 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 217 transitions. [2021-03-10 21:43:53,997 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 217 transitions. Word has length 14 [2021-03-10 21:43:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:53,997 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 217 transitions. [2021-03-10 21:43:53,997 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) [2021-03-10 21:43:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 217 transitions. [2021-03-10 21:43:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:53,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:53,998 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:54,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:54,203 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash -605098390, now seen corresponding path program 47 times [2021-03-10 21:43:54,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:54,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353824665] [2021-03-10 21:43:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:54,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353824665] [2021-03-10 21:43:54,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941226951] [2021-03-10 21:43:54,361 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 [2021-03-10 21:43:54,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:54,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:54,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:54,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:54,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:54,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:54,722 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 [2021-03-10 21:43:54,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:54,740 INFO L628 ElimStorePlain]: treesize reduction 111, result has 9.0 percent of original size [2021-03-10 21:43:54,741 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:54,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-03-10 21:43:54,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_55 vanished before elimination [2021-03-10 21:43:54,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:54,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:54,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:54,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 21:43:54,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255982990] [2021-03-10 21:43:54,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:54,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:54,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:54,750 INFO L87 Difference]: Start difference. First operand 93 states and 217 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:55,188 INFO L93 Difference]: Finished difference Result 123 states and 274 transitions. [2021-03-10 21:43:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:55,189 INFO L225 Difference]: With dead ends: 123 [2021-03-10 21:43:55,189 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:43:55,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:43:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:43:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-03-10 21:43:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4086021505376345) internal successors, (224), 93 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 224 transitions. [2021-03-10 21:43:55,191 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 224 transitions. Word has length 14 [2021-03-10 21:43:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:55,191 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 224 transitions. [2021-03-10 21:43:55,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 224 transitions. [2021-03-10 21:43:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:55,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:55,191 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:55,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-03-10 21:43:55,406 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash -597367992, now seen corresponding path program 48 times [2021-03-10 21:43:55,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:55,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472444684] [2021-03-10 21:43:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:55,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472444684] [2021-03-10 21:43:55,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452710392] [2021-03-10 21:43:55,680 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 [2021-03-10 21:43:55,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:43:55,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:55,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:55,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:55,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:55,996 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 [2021-03-10 21:43:55,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:56,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:56,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:56,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:56,002 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 [2021-03-10 21:43:56,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:56,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:56,008 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 [2021-03-10 21:43:56,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:56,020 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-03-10 21:43:56,020 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:56,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:56,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-03-10 21:43:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:56,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:56,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:43:56,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412788456] [2021-03-10 21:43:56,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:43:56,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:43:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:56,045 INFO L87 Difference]: Start difference. First operand 94 states and 224 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) [2021-03-10 21:43:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:56,816 INFO L93 Difference]: Finished difference Result 160 states and 346 transitions. [2021-03-10 21:43:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:43:56,816 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 [2021-03-10 21:43:56,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:56,817 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:43:56,817 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 21:43:56,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1006.6ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:43:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 21:43:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 99. [2021-03-10 21:43:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.4693877551020407) internal successors, (242), 98 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 242 transitions. [2021-03-10 21:43:56,819 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 242 transitions. Word has length 14 [2021-03-10 21:43:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:56,819 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 242 transitions. [2021-03-10 21:43:56,819 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) [2021-03-10 21:43:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 242 transitions. [2021-03-10 21:43:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:56,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:56,819 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:57,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:57,023 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1262043392, now seen corresponding path program 49 times [2021-03-10 21:43:57,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:57,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094722997] [2021-03-10 21:43:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:57,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094722997] [2021-03-10 21:43:57,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460035811] [2021-03-10 21:43:57,335 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 [2021-03-10 21:43:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:57,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:57,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:57,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:57,656 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 [2021-03-10 21:43:57,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:57,675 INFO L628 ElimStorePlain]: treesize reduction 111, result has 9.0 percent of original size [2021-03-10 21:43:57,675 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:57,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-03-10 21:43:57,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-03-10 21:43:57,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:57,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:57,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:57,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:43:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922380050] [2021-03-10 21:43:57,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:43:57,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:43:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:57,715 INFO L87 Difference]: Start difference. First operand 99 states and 242 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) [2021-03-10 21:43:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:58,259 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2021-03-10 21:43:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:43:58,259 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 [2021-03-10 21:43:58,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:58,260 INFO L225 Difference]: With dead ends: 113 [2021-03-10 21:43:58,260 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 21:43:58,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 832.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:43:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 21:43:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2021-03-10 21:43:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.4693877551020407) internal successors, (242), 98 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 242 transitions. [2021-03-10 21:43:58,262 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 242 transitions. Word has length 14 [2021-03-10 21:43:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:58,262 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 242 transitions. [2021-03-10 21:43:58,262 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) [2021-03-10 21:43:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 242 transitions. [2021-03-10 21:43:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:58,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:58,262 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:58,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-03-10 21:43:58,463 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1720196186, now seen corresponding path program 50 times [2021-03-10 21:43:58,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:58,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142492060] [2021-03-10 21:43:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:58,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142492060] [2021-03-10 21:43:58,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152589849] [2021-03-10 21:43:58,621 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 [2021-03-10 21:43:58,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:43:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:43:58,954 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 [2021-03-10 21:43:58,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:58,972 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-03-10 21:43:58,973 INFO L518 ElimStorePlain]: Eliminatee v_prenex_65 vanished before elimination [2021-03-10 21:43:58,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:43:58,973 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-03-10 21:43:58,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:58,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-03-10 21:43:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:58,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:58,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:43:58,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747751486] [2021-03-10 21:43:58,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:43:58,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:58,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:43:58,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:58,995 INFO L87 Difference]: Start difference. First operand 99 states and 242 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) [2021-03-10 21:43:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:59,318 INFO L93 Difference]: Finished difference Result 162 states and 368 transitions. [2021-03-10 21:43:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:59,318 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 [2021-03-10 21:43:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:59,319 INFO L225 Difference]: With dead ends: 162 [2021-03-10 21:43:59,319 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:43:59,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:43:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 101. [2021-03-10 21:43:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.51) internal successors, (251), 100 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) [2021-03-10 21:43:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 251 transitions. [2021-03-10 21:43:59,321 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 251 transitions. Word has length 14 [2021-03-10 21:43:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:59,321 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 251 transitions. [2021-03-10 21:43:59,321 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) [2021-03-10 21:43:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 251 transitions. [2021-03-10 21:43:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:59,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:59,322 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:59,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-03-10 21:43:59,527 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1093096512, now seen corresponding path program 51 times [2021-03-10 21:43:59,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:59,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034353251] [2021-03-10 21:43:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034353251] [2021-03-10 21:43:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002248497] [2021-03-10 21:43:59,895 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 [2021-03-10 21:43:59,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:59,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:43:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:00,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:44:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:00,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:00,140 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 [2021-03-10 21:44:00,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:00,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:44:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:00,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:00,146 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 [2021-03-10 21:44:00,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:00,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:44:00,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:00,150 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 [2021-03-10 21:44:00,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:00,164 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-03-10 21:44:00,164 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:00,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:00,164 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-03-10 21:44:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:00,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:00,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:44:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546984487] [2021-03-10 21:44:00,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:00,190 INFO L87 Difference]: Start difference. First operand 101 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) [2021-03-10 21:44:00,681 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-10 21:44:00,987 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-10 21:44:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:01,003 INFO L93 Difference]: Finished difference Result 134 states and 309 transitions. [2021-03-10 21:44:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:44:01,003 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 [2021-03-10 21:44:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:01,004 INFO L225 Difference]: With dead ends: 134 [2021-03-10 21:44:01,004 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 21:44:01,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1107.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 21:44:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2021-03-10 21:44:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.51) internal successors, (251), 100 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) [2021-03-10 21:44:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 251 transitions. [2021-03-10 21:44:01,006 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 251 transitions. Word has length 14 [2021-03-10 21:44:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:01,006 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 251 transitions. [2021-03-10 21:44:01,006 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) [2021-03-10 21:44:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 251 transitions. [2021-03-10 21:44:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:01,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:01,006 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:01,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:01,219 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:01,220 INFO L82 PathProgramCache]: Analyzing trace with hash 351187404, now seen corresponding path program 52 times [2021-03-10 21:44:01,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:01,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297584862] [2021-03-10 21:44:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297584862] [2021-03-10 21:44:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406523934] [2021-03-10 21:44:01,300 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 [2021-03-10 21:44:01,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:01,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:01,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:01,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:01,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:01,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:01,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:01,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:01,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:01,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:44:01,420 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:01,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:01,423 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:01,446 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-03-10 21:44:01,446 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:01,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:01,447 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-03-10 21:44:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:01,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:01,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:44:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056326021] [2021-03-10 21:44:01,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:44:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:44:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:01,472 INFO L87 Difference]: Start difference. First operand 101 states and 251 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) [2021-03-10 21:44:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:01,740 INFO L93 Difference]: Finished difference Result 135 states and 319 transitions. [2021-03-10 21:44:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:01,741 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 [2021-03-10 21:44:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:01,741 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:44:01,741 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 21:44:01,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 21:44:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-03-10 21:44:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.5257731958762886) internal successors, (245), 97 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 245 transitions. [2021-03-10 21:44:01,743 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 245 transitions. Word has length 15 [2021-03-10 21:44:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:01,743 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 245 transitions. [2021-03-10 21:44:01,743 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) [2021-03-10 21:44:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 245 transitions. [2021-03-10 21:44:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:01,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:01,744 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:01,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-03-10 21:44:01,948 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1964128954, now seen corresponding path program 53 times [2021-03-10 21:44:01,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:01,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261054620] [2021-03-10 21:44:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261054620] [2021-03-10 21:44:02,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31444259] [2021-03-10 21:44:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:44:02,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:02,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:02,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:02,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,127 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-03-10 21:44:02,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:02,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-03-10 21:44:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:02,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:44:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889806430] [2021-03-10 21:44:02,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:44:02,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:02,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:44:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:02,145 INFO L87 Difference]: Start difference. First operand 98 states and 245 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) [2021-03-10 21:44:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:02,273 INFO L93 Difference]: Finished difference Result 135 states and 324 transitions. [2021-03-10 21:44:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:44:02,273 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 [2021-03-10 21:44:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:02,274 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:44:02,274 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:44:02,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:44:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2021-03-10 21:44:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.5306122448979593) internal successors, (248), 98 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 248 transitions. [2021-03-10 21:44:02,276 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 248 transitions. Word has length 15 [2021-03-10 21:44:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:02,276 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 248 transitions. [2021-03-10 21:44:02,276 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) [2021-03-10 21:44:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 248 transitions. [2021-03-10 21:44:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:02,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:02,276 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:02,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:02,491 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:02,491 INFO L82 PathProgramCache]: Analyzing trace with hash -313196838, now seen corresponding path program 54 times [2021-03-10 21:44:02,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:02,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590503826] [2021-03-10 21:44:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590503826] [2021-03-10 21:44:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322939420] [2021-03-10 21:44:02,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:02,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:44:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:02,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:02,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:02,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:02,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:02,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:02,725 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:02,725 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:02,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:02,726 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:02,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:02,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264896344] [2021-03-10 21:44:02,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:02,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:02,774 INFO L87 Difference]: Start difference. First operand 99 states and 248 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) [2021-03-10 21:44:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:02,981 INFO L93 Difference]: Finished difference Result 187 states and 409 transitions. [2021-03-10 21:44:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:44:02,982 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 [2021-03-10 21:44:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:02,982 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:44:02,982 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:44:02,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:44:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 106. [2021-03-10 21:44:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.6) internal successors, (273), 105 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2021-03-10 21:44:02,984 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 15 [2021-03-10 21:44:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:02,984 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2021-03-10 21:44:02,984 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) [2021-03-10 21:44:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2021-03-10 21:44:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:02,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:02,985 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:03,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-10 21:44:03,199 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash 488419390, now seen corresponding path program 55 times [2021-03-10 21:44:03,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:03,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992027780] [2021-03-10 21:44:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:03,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992027780] [2021-03-10 21:44:03,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921036788] [2021-03-10 21:44:03,281 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 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 [2021-03-10 21:44:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:03,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:03,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:03,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:03,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:03,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:03,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:03,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:03,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:03,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:03,436 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:03,436 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:03,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:03,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:03,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:03,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:03,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340925727] [2021-03-10 21:44:03,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:03,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:03,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:03,503 INFO L87 Difference]: Start difference. First operand 106 states and 273 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) [2021-03-10 21:44:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:04,194 INFO L93 Difference]: Finished difference Result 194 states and 423 transitions. [2021-03-10 21:44:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:44:04,195 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 [2021-03-10 21:44:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:04,195 INFO L225 Difference]: With dead ends: 194 [2021-03-10 21:44:04,195 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:44:04,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:44:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:44:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 110. [2021-03-10 21:44:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.5871559633027523) internal successors, (282), 109 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 282 transitions. [2021-03-10 21:44:04,197 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 282 transitions. Word has length 15 [2021-03-10 21:44:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:04,197 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 282 transitions. [2021-03-10 21:44:04,198 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) [2021-03-10 21:44:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 282 transitions. [2021-03-10 21:44:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:04,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:04,198 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:04,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:04,413 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2088204200, now seen corresponding path program 56 times [2021-03-10 21:44:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:04,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786749788] [2021-03-10 21:44:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:04,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786749788] [2021-03-10 21:44:04,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488454841] [2021-03-10 21:44:04,487 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 [2021-03-10 21:44:04,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:04,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:04,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:04,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:04,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,587 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 17 treesize of output 13 [2021-03-10 21:44:04,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,591 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 15 treesize of output 11 [2021-03-10 21:44:04,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:04,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:04,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:04,627 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:04,627 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:04,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:04,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:04,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:04,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:04,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278086302] [2021-03-10 21:44:04,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:04,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:04,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:04,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:04,674 INFO L87 Difference]: Start difference. First operand 110 states and 282 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) [2021-03-10 21:44:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:05,085 INFO L93 Difference]: Finished difference Result 180 states and 404 transitions. [2021-03-10 21:44:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:44:05,085 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 [2021-03-10 21:44:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:05,086 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:44:05,086 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 21:44:05,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:44:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 21:44:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 108. [2021-03-10 21:44:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.5514018691588785) internal successors, (273), 107 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 273 transitions. [2021-03-10 21:44:05,088 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 273 transitions. Word has length 15 [2021-03-10 21:44:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:05,088 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 273 transitions. [2021-03-10 21:44:05,088 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) [2021-03-10 21:44:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 273 transitions. [2021-03-10 21:44:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:05,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:05,088 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:05,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:05,303 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 496149788, now seen corresponding path program 57 times [2021-03-10 21:44:05,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:05,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064557453] [2021-03-10 21:44:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064557453] [2021-03-10 21:44:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359898738] [2021-03-10 21:44:05,380 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 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 [2021-03-10 21:44:05,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:05,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:05,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:05,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:05,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:05,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:05,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:05,519 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 16 treesize of output 12 [2021-03-10 21:44:05,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:05,541 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:05,541 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:05,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:05,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:05,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:05,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315730716] [2021-03-10 21:44:05,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:05,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:05,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:05,562 INFO L87 Difference]: Start difference. First operand 108 states and 273 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) [2021-03-10 21:44:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:05,799 INFO L93 Difference]: Finished difference Result 168 states and 397 transitions. [2021-03-10 21:44:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:05,799 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 [2021-03-10 21:44:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:05,800 INFO L225 Difference]: With dead ends: 168 [2021-03-10 21:44:05,800 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:44:05,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:44:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 110. [2021-03-10 21:44:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.5596330275229358) internal successors, (279), 109 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 279 transitions. [2021-03-10 21:44:05,801 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 279 transitions. Word has length 15 [2021-03-10 21:44:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:05,802 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 279 transitions. [2021-03-10 21:44:05,802 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) [2021-03-10 21:44:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 279 transitions. [2021-03-10 21:44:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:05,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:05,802 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:06,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-03-10 21:44:06,011 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:06,011 INFO L82 PathProgramCache]: Analyzing trace with hash -993255208, now seen corresponding path program 58 times [2021-03-10 21:44:06,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:06,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672030451] [2021-03-10 21:44:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672030451] [2021-03-10 21:44:06,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205675636] [2021-03-10 21:44:06,083 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 [2021-03-10 21:44:06,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:06,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:06,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:06,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:06,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:06,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:06,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:06,245 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:06,245 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:06,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:06,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:06,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:06,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975969820] [2021-03-10 21:44:06,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:06,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:06,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:06,270 INFO L87 Difference]: Start difference. First operand 110 states and 279 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) [2021-03-10 21:44:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:06,406 INFO L93 Difference]: Finished difference Result 149 states and 361 transitions. [2021-03-10 21:44:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:44:06,406 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 [2021-03-10 21:44:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:06,406 INFO L225 Difference]: With dead ends: 149 [2021-03-10 21:44:06,406 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 21:44:06,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 21:44:06,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2021-03-10 21:44:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.5596330275229358) internal successors, (279), 109 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 279 transitions. [2021-03-10 21:44:06,415 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 279 transitions. Word has length 15 [2021-03-10 21:44:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:06,415 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 279 transitions. [2021-03-10 21:44:06,415 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) [2021-03-10 21:44:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 279 transitions. [2021-03-10 21:44:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:06,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:06,416 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:06,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-03-10 21:44:06,619 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1505045474, now seen corresponding path program 59 times [2021-03-10 21:44:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:06,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576208368] [2021-03-10 21:44:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576208368] [2021-03-10 21:44:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463428098] [2021-03-10 21:44:06,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:44:06,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:44:06,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:06,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:06,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:06,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:06,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:06,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:06,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:06,795 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 16 treesize of output 12 [2021-03-10 21:44:06,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:06,815 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:44:06,816 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:06,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:06,816 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:44:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:06,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:06,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124023334] [2021-03-10 21:44:06,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:06,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:06,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:06,840 INFO L87 Difference]: Start difference. First operand 110 states and 279 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) [2021-03-10 21:44:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:07,010 INFO L93 Difference]: Finished difference Result 189 states and 434 transitions. [2021-03-10 21:44:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:44:07,010 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 [2021-03-10 21:44:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:07,011 INFO L225 Difference]: With dead ends: 189 [2021-03-10 21:44:07,011 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:44:07,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:44:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:44:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 125. [2021-03-10 21:44:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.6774193548387095) internal successors, (332), 124 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 332 transitions. [2021-03-10 21:44:07,013 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 332 transitions. Word has length 15 [2021-03-10 21:44:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:07,013 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 332 transitions. [2021-03-10 21:44:07,013 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) [2021-03-10 21:44:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 332 transitions. [2021-03-10 21:44:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:07,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:07,013 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:07,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:07,214 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:07,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1870221114, now seen corresponding path program 60 times [2021-03-10 21:44:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:07,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735775596] [2021-03-10 21:44:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:07,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735775596] [2021-03-10 21:44:07,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113410796] [2021-03-10 21:44:07,277 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) [2021-03-10 21:44:07,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:07,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:07,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:07,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:07,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:07,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:07,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:07,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:07,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:07,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:07,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:07,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:07,402 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:07,435 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-03-10 21:44:07,435 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:07,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:07,436 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:44:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:07,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:07,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:07,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40879968] [2021-03-10 21:44:07,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:07,469 INFO L87 Difference]: Start difference. First operand 125 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:07,774 INFO L93 Difference]: Finished difference Result 172 states and 401 transitions. [2021-03-10 21:44:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:44:07,775 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 [2021-03-10 21:44:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:07,775 INFO L225 Difference]: With dead ends: 172 [2021-03-10 21:44:07,775 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:44:07,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:44:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:44:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2021-03-10 21:44:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.642857142857143) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 333 transitions. [2021-03-10 21:44:07,777 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 333 transitions. Word has length 15 [2021-03-10 21:44:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:07,777 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 333 transitions. [2021-03-10 21:44:07,777 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) [2021-03-10 21:44:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 333 transitions. [2021-03-10 21:44:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:07,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:07,778 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:07,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-03-10 21:44:07,991 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1497315076, now seen corresponding path program 61 times [2021-03-10 21:44:07,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:07,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531420719] [2021-03-10 21:44:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531420719] [2021-03-10 21:44:08,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422690685] [2021-03-10 21:44:08,056 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 [2021-03-10 21:44:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,137 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 16 treesize of output 12 [2021-03-10 21:44:08,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,142 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 [2021-03-10 21:44:08,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,146 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 15 treesize of output 11 [2021-03-10 21:44:08,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,149 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 [2021-03-10 21:44:08,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,183 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:08,183 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:08,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:08,184 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:08,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:08,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731650218] [2021-03-10 21:44:08,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:08,237 INFO L87 Difference]: Start difference. First operand 127 states and 333 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) [2021-03-10 21:44:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:08,510 INFO L93 Difference]: Finished difference Result 213 states and 465 transitions. [2021-03-10 21:44:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:44:08,511 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 [2021-03-10 21:44:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:08,511 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:44:08,511 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:44:08,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:44:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 129. [2021-03-10 21:44:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.6640625) internal successors, (341), 128 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 341 transitions. [2021-03-10 21:44:08,513 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 341 transitions. Word has length 15 [2021-03-10 21:44:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:08,514 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 341 transitions. [2021-03-10 21:44:08,514 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) [2021-03-10 21:44:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 341 transitions. [2021-03-10 21:44:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:08,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:08,514 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:08,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-03-10 21:44:08,729 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash -695698848, now seen corresponding path program 62 times [2021-03-10 21:44:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:08,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867780871] [2021-03-10 21:44:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867780871] [2021-03-10 21:44:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278785738] [2021-03-10 21:44:08,795 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 [2021-03-10 21:44:08,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:08,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:08,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:08,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:08,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:08,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:08,893 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 16 treesize of output 12 [2021-03-10 21:44:08,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:08,926 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:08,927 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:08,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:08,927 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:08,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:08,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869446661] [2021-03-10 21:44:08,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:08,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:08,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:08,994 INFO L87 Difference]: Start difference. First operand 129 states and 341 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) [2021-03-10 21:44:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:09,439 INFO L93 Difference]: Finished difference Result 209 states and 461 transitions. [2021-03-10 21:44:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:44:09,440 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 [2021-03-10 21:44:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:09,440 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:44:09,440 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 21:44:09,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:44:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 21:44:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 131. [2021-03-10 21:44:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.6615384615384614) internal successors, (346), 130 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 346 transitions. [2021-03-10 21:44:09,442 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 346 transitions. Word has length 15 [2021-03-10 21:44:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:09,442 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 346 transitions. [2021-03-10 21:44:09,443 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) [2021-03-10 21:44:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 346 transitions. [2021-03-10 21:44:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:09,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:09,443 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:09,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:09,643 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:09,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1022644858, now seen corresponding path program 63 times [2021-03-10 21:44:09,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:09,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119277305] [2021-03-10 21:44:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119277305] [2021-03-10 21:44:09,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841917814] [2021-03-10 21:44:09,714 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 [2021-03-10 21:44:09,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:44:09,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:09,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:09,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,802 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 [2021-03-10 21:44:09,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:09,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,806 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 17 treesize of output 13 [2021-03-10 21:44:09,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,810 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 [2021-03-10 21:44:09,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:09,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:09,814 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 [2021-03-10 21:44:09,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:09,856 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:09,856 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:09,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:09,857 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:09,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:09,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234429742] [2021-03-10 21:44:09,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:09,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:09,904 INFO L87 Difference]: Start difference. First operand 131 states and 346 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) [2021-03-10 21:44:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:10,193 INFO L93 Difference]: Finished difference Result 195 states and 445 transitions. [2021-03-10 21:44:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:44:10,193 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 [2021-03-10 21:44:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:10,194 INFO L225 Difference]: With dead ends: 195 [2021-03-10 21:44:10,194 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:44:10,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:10,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:44:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2021-03-10 21:44:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.625) internal successors, (336), 128 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 336 transitions. [2021-03-10 21:44:10,196 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 336 transitions. Word has length 15 [2021-03-10 21:44:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:10,196 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 336 transitions. [2021-03-10 21:44:10,196 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) [2021-03-10 21:44:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 336 transitions. [2021-03-10 21:44:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:10,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:10,196 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:10,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-03-10 21:44:10,407 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1379198886, now seen corresponding path program 64 times [2021-03-10 21:44:10,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:10,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124233125] [2021-03-10 21:44:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124233125] [2021-03-10 21:44:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264360837] [2021-03-10 21:44:10,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:44:10,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:10,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:10,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:10,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,608 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 15 treesize of output 11 [2021-03-10 21:44:10,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:10,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:10,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:10,650 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:10,651 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:10,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:10,651 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:10,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:10,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181437624] [2021-03-10 21:44:10,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:10,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:10,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:10,726 INFO L87 Difference]: Start difference. First operand 129 states and 336 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) [2021-03-10 21:44:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:11,147 INFO L93 Difference]: Finished difference Result 175 states and 410 transitions. [2021-03-10 21:44:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:44:11,148 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 [2021-03-10 21:44:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:11,149 INFO L225 Difference]: With dead ends: 175 [2021-03-10 21:44:11,149 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 21:44:11,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:44:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 21:44:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-03-10 21:44:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.5984848484848486) internal successors, (343), 132 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 343 transitions. [2021-03-10 21:44:11,151 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 343 transitions. Word has length 15 [2021-03-10 21:44:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:11,151 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 343 transitions. [2021-03-10 21:44:11,151 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) [2021-03-10 21:44:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 343 transitions. [2021-03-10 21:44:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:11,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:11,151 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:11,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:11,359 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash 349848448, now seen corresponding path program 65 times [2021-03-10 21:44:11,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:11,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232925841] [2021-03-10 21:44:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232925841] [2021-03-10 21:44:11,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929263881] [2021-03-10 21:44:11,433 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 [2021-03-10 21:44:11,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:11,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:11,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:11,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:11,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:11,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:11,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:11,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:11,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:11,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:11,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:11,593 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 17 treesize of output 13 [2021-03-10 21:44:11,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:11,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:11,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:11,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:11,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:11,636 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:11,637 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:11,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:11,638 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:11,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:11,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024579530] [2021-03-10 21:44:11,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:11,666 INFO L87 Difference]: Start difference. First operand 133 states and 343 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) [2021-03-10 21:44:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:12,082 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2021-03-10 21:44:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:44:12,082 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 [2021-03-10 21:44:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:12,083 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:44:12,083 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:44:12,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:44:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:44:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2021-03-10 21:44:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 339 transitions. [2021-03-10 21:44:12,085 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 339 transitions. Word has length 15 [2021-03-10 21:44:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:12,085 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 339 transitions. [2021-03-10 21:44:12,085 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) [2021-03-10 21:44:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 339 transitions. [2021-03-10 21:44:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:12,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:12,085 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:12,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-10 21:44:12,299 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2117593850, now seen corresponding path program 66 times [2021-03-10 21:44:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:12,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462959268] [2021-03-10 21:44:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462959268] [2021-03-10 21:44:12,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418408298] [2021-03-10 21:44:12,371 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 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 [2021-03-10 21:44:12,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:44:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:12,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:12,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:12,477 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 [2021-03-10 21:44:12,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:12,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:12,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:12,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:12,503 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:12,504 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:12,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:12,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:12,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:12,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818879173] [2021-03-10 21:44:12,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:12,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:12,523 INFO L87 Difference]: Start difference. First operand 133 states and 339 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) [2021-03-10 21:44:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:12,679 INFO L93 Difference]: Finished difference Result 187 states and 436 transitions. [2021-03-10 21:44:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:12,679 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 [2021-03-10 21:44:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:12,680 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:44:12,680 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:44:12,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:44:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 134. [2021-03-10 21:44:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.5789473684210527) internal successors, (343), 133 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2021-03-10 21:44:12,682 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 15 [2021-03-10 21:44:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:12,682 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2021-03-10 21:44:12,682 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) [2021-03-10 21:44:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2021-03-10 21:44:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:12,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:12,682 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:12,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-03-10 21:44:12,899 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1913634692, now seen corresponding path program 67 times [2021-03-10 21:44:12,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:12,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903825004] [2021-03-10 21:44:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903825004] [2021-03-10 21:44:12,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084258638] [2021-03-10 21:44:12,978 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 [2021-03-10 21:44:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:13,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,087 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 [2021-03-10 21:44:13,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:13,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,096 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 15 treesize of output 11 [2021-03-10 21:44:13,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:13,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,135 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:13,135 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:13,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:13,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:13,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:13,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418312913] [2021-03-10 21:44:13,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:13,184 INFO L87 Difference]: Start difference. First operand 134 states and 343 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) [2021-03-10 21:44:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,338 INFO L93 Difference]: Finished difference Result 197 states and 449 transitions. [2021-03-10 21:44:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:44:13,339 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 [2021-03-10 21:44:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,340 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:44:13,340 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:44:13,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:44:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2021-03-10 21:44:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.6258992805755397) internal successors, (365), 139 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) [2021-03-10 21:44:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 365 transitions. [2021-03-10 21:44:13,342 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 365 transitions. Word has length 15 [2021-03-10 21:44:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,342 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 365 transitions. [2021-03-10 21:44:13,342 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) [2021-03-10 21:44:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 365 transitions. [2021-03-10 21:44:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:13,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,342 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:13,559 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1112018464, now seen corresponding path program 68 times [2021-03-10 21:44:13,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642990688] [2021-03-10 21:44:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642990688] [2021-03-10 21:44:13,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780955682] [2021-03-10 21:44:13,640 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 [2021-03-10 21:44:13,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:13,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:13,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:13,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:13,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:13,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:13,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:13,776 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:13,777 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:13,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:13,777 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:13,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:13,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103850954] [2021-03-10 21:44:13,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:13,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:13,844 INFO L87 Difference]: Start difference. First operand 140 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) [2021-03-10 21:44:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:14,396 INFO L93 Difference]: Finished difference Result 204 states and 463 transitions. [2021-03-10 21:44:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:44:14,396 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 [2021-03-10 21:44:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:14,397 INFO L225 Difference]: With dead ends: 204 [2021-03-10 21:44:14,397 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:44:14,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:44:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:44:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 143. [2021-03-10 21:44:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.6267605633802815) internal successors, (373), 142 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 373 transitions. [2021-03-10 21:44:14,399 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 373 transitions. Word has length 15 [2021-03-10 21:44:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:14,399 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 373 transitions. [2021-03-10 21:44:14,399 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) [2021-03-10 21:44:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 373 transitions. [2021-03-10 21:44:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:14,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:14,400 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:14,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-03-10 21:44:14,607 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 606325242, now seen corresponding path program 69 times [2021-03-10 21:44:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:14,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116897441] [2021-03-10 21:44:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:14,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116897441] [2021-03-10 21:44:14,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916926052] [2021-03-10 21:44:14,683 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 [2021-03-10 21:44:14,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:44:14,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:14,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:14,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:14,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:14,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:14,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:14,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:14,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:14,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:14,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:14,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:14,822 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:14,823 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:14,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:14,823 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:14,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:14,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052409095] [2021-03-10 21:44:14,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:14,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:14,870 INFO L87 Difference]: Start difference. First operand 143 states and 373 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) [2021-03-10 21:44:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:15,237 INFO L93 Difference]: Finished difference Result 190 states and 444 transitions. [2021-03-10 21:44:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:15,238 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 [2021-03-10 21:44:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:15,239 INFO L225 Difference]: With dead ends: 190 [2021-03-10 21:44:15,239 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 21:44:15,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 21:44:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 135. [2021-03-10 21:44:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.5671641791044775) internal successors, (344), 134 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 344 transitions. [2021-03-10 21:44:15,241 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 344 transitions. Word has length 15 [2021-03-10 21:44:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:15,241 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 344 transitions. [2021-03-10 21:44:15,241 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) [2021-03-10 21:44:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 344 transitions. [2021-03-10 21:44:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:15,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:15,242 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:15,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:15,442 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1104288066, now seen corresponding path program 70 times [2021-03-10 21:44:15,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:15,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244928710] [2021-03-10 21:44:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244928710] [2021-03-10 21:44:15,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502477949] [2021-03-10 21:44:15,515 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 [2021-03-10 21:44:15,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:15,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:15,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:15,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:15,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:15,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:15,659 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:15,660 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:15,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:15,660 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:15,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:15,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635550779] [2021-03-10 21:44:15,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:15,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:15,681 INFO L87 Difference]: Start difference. First operand 135 states and 344 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) [2021-03-10 21:44:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:15,917 INFO L93 Difference]: Finished difference Result 171 states and 416 transitions. [2021-03-10 21:44:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:15,917 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 [2021-03-10 21:44:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:15,918 INFO L225 Difference]: With dead ends: 171 [2021-03-10 21:44:15,918 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 21:44:15,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 21:44:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2021-03-10 21:44:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.5714285714285716) internal successors, (342), 133 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 342 transitions. [2021-03-10 21:44:15,920 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 342 transitions. Word has length 15 [2021-03-10 21:44:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:15,920 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 342 transitions. [2021-03-10 21:44:15,920 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) [2021-03-10 21:44:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 342 transitions. [2021-03-10 21:44:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:15,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:15,920 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:16,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-03-10 21:44:16,135 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1701274234, now seen corresponding path program 71 times [2021-03-10 21:44:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:16,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685021502] [2021-03-10 21:44:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685021502] [2021-03-10 21:44:16,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511656201] [2021-03-10 21:44:16,225 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 [2021-03-10 21:44:16,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:16,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:16,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:16,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:16,343 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 15 treesize of output 11 [2021-03-10 21:44:16,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:16,347 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 [2021-03-10 21:44:16,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:16,371 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:16,371 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:16,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:16,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:16,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:16,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778957268] [2021-03-10 21:44:16,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:16,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:16,393 INFO L87 Difference]: Start difference. First operand 134 states and 342 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) [2021-03-10 21:44:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:16,532 INFO L93 Difference]: Finished difference Result 165 states and 404 transitions. [2021-03-10 21:44:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:16,532 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 [2021-03-10 21:44:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:16,533 INFO L225 Difference]: With dead ends: 165 [2021-03-10 21:44:16,533 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:44:16,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:44:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2021-03-10 21:44:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.573529411764706) internal successors, (350), 136 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 350 transitions. [2021-03-10 21:44:16,535 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 350 transitions. Word has length 15 [2021-03-10 21:44:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:16,535 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 350 transitions. [2021-03-10 21:44:16,535 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) [2021-03-10 21:44:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 350 transitions. [2021-03-10 21:44:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:16,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:16,535 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:16,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:16,739 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash 202352474, now seen corresponding path program 72 times [2021-03-10 21:44:16,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:16,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875300615] [2021-03-10 21:44:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875300615] [2021-03-10 21:44:16,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972360330] [2021-03-10 21:44:16,802 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 [2021-03-10 21:44:16,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:16,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:16,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:16,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:16,913 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 15 treesize of output 11 [2021-03-10 21:44:16,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:16,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:16,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:16,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:16,935 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:44:16,935 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:16,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:16,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:44:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:16,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:16,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864230925] [2021-03-10 21:44:16,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:16,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:16,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:16,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:16,959 INFO L87 Difference]: Start difference. First operand 137 states and 350 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) [2021-03-10 21:44:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,141 INFO L93 Difference]: Finished difference Result 216 states and 499 transitions. [2021-03-10 21:44:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:17,141 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 [2021-03-10 21:44:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,142 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:44:17,142 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:44:17,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:44:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2021-03-10 21:44:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.642857142857143) internal successors, (407), 154 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 407 transitions. [2021-03-10 21:44:17,145 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 407 transitions. Word has length 15 [2021-03-10 21:44:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,145 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 407 transitions. [2021-03-10 21:44:17,145 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) [2021-03-10 21:44:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 407 transitions. [2021-03-10 21:44:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:17,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,145 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:17,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:17,356 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1756401598, now seen corresponding path program 73 times [2021-03-10 21:44:17,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:17,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918770353] [2021-03-10 21:44:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918770353] [2021-03-10 21:44:17,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044361287] [2021-03-10 21:44:17,423 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) [2021-03-10 21:44:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:17,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:17,564 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 [2021-03-10 21:44:17,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:17,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:17,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:17,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:17,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:17,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:17,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:17,578 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 17 treesize of output 13 [2021-03-10 21:44:17,579 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:17,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:17,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:17,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:17,614 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-03-10 21:44:17,614 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:17,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:17,615 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:44:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:17,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:17,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899320082] [2021-03-10 21:44:17,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:17,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:17,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:17,650 INFO L87 Difference]: Start difference. First operand 155 states and 407 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) [2021-03-10 21:44:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,975 INFO L93 Difference]: Finished difference Result 201 states and 467 transitions. [2021-03-10 21:44:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:44:17,975 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 [2021-03-10 21:44:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,976 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:44:17,976 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:44:17,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:44:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:44:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 158. [2021-03-10 21:44:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.611464968152866) internal successors, (410), 157 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 410 transitions. [2021-03-10 21:44:17,978 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 410 transitions. Word has length 15 [2021-03-10 21:44:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,979 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 410 transitions. [2021-03-10 21:44:17,979 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) [2021-03-10 21:44:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 410 transitions. [2021-03-10 21:44:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:17,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,979 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:18,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-03-10 21:44:18,187 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:18,187 INFO L82 PathProgramCache]: Analyzing trace with hash 441994812, now seen corresponding path program 74 times [2021-03-10 21:44:18,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:18,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349480740] [2021-03-10 21:44:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349480740] [2021-03-10 21:44:18,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562846514] [2021-03-10 21:44:18,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:18,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:18,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:18,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:18,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:18,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:18,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:18,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:18,399 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:44:18,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:18,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:18,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:44:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:18,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:18,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794621787] [2021-03-10 21:44:18,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:18,423 INFO L87 Difference]: Start difference. First operand 158 states and 410 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) [2021-03-10 21:44:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:18,877 INFO L93 Difference]: Finished difference Result 232 states and 530 transitions. [2021-03-10 21:44:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:44:18,878 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 [2021-03-10 21:44:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:18,878 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:44:18,878 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:44:18,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:44:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:44:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 156. [2021-03-10 21:44:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.632258064516129) internal successors, (408), 155 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 408 transitions. [2021-03-10 21:44:18,888 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 408 transitions. Word has length 15 [2021-03-10 21:44:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:18,888 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 408 transitions. [2021-03-10 21:44:18,888 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) [2021-03-10 21:44:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 408 transitions. [2021-03-10 21:44:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:18,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:18,888 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-03-10 21:44:19,103 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash -477705896, now seen corresponding path program 75 times [2021-03-10 21:44:19,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853364569] [2021-03-10 21:44:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853364569] [2021-03-10 21:44:19,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008841115] [2021-03-10 21:44:19,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:44:19,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:19,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:19,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:19,322 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 [2021-03-10 21:44:19,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:19,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:19,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:19,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:19,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:19,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:19,366 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-03-10 21:44:19,366 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:19,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:19,367 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:44:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:19,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:19,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187849735] [2021-03-10 21:44:19,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:19,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:19,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:19,400 INFO L87 Difference]: Start difference. First operand 156 states and 408 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) [2021-03-10 21:44:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,858 INFO L93 Difference]: Finished difference Result 202 states and 474 transitions. [2021-03-10 21:44:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:44:19,859 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 [2021-03-10 21:44:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,859 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:44:19,859 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:44:19,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 442.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:44:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:44:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 157. [2021-03-10 21:44:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.621794871794872) internal successors, (409), 156 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) [2021-03-10 21:44:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 409 transitions. [2021-03-10 21:44:19,861 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 409 transitions. Word has length 15 [2021-03-10 21:44:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,861 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 409 transitions. [2021-03-10 21:44:19,862 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) [2021-03-10 21:44:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 409 transitions. [2021-03-10 21:44:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:19,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,864 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:20,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:20,065 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 449725210, now seen corresponding path program 76 times [2021-03-10 21:44:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574094771] [2021-03-10 21:44:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574094771] [2021-03-10 21:44:20,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745712963] [2021-03-10 21:44:20,136 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 [2021-03-10 21:44:20,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:20,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:20,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:20,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:20,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,241 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 17 treesize of output 13 [2021-03-10 21:44:20,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:20,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:20,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:20,248 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 [2021-03-10 21:44:20,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:20,283 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:20,283 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:20,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:20,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:20,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:20,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987287172] [2021-03-10 21:44:20,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:20,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:20,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:20,334 INFO L87 Difference]: Start difference. First operand 157 states and 409 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:20,650 INFO L93 Difference]: Finished difference Result 245 states and 529 transitions. [2021-03-10 21:44:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:44:20,651 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 [2021-03-10 21:44:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:20,652 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:44:20,652 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:44:20,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:44:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:44:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 153. [2021-03-10 21:44:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.6052631578947367) internal successors, (396), 152 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 396 transitions. [2021-03-10 21:44:20,654 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 396 transitions. Word has length 15 [2021-03-10 21:44:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:20,654 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 396 transitions. [2021-03-10 21:44:20,654 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) [2021-03-10 21:44:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 396 transitions. [2021-03-10 21:44:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:20,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:20,655 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:20,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-03-10 21:44:20,855 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:20,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1251341438, now seen corresponding path program 77 times [2021-03-10 21:44:20,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:20,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314252616] [2021-03-10 21:44:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314252616] [2021-03-10 21:44:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438788791] [2021-03-10 21:44:20,925 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 [2021-03-10 21:44:20,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:21,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,029 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 16 treesize of output 12 [2021-03-10 21:44:21,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:21,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:21,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:21,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,083 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:21,084 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:21,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:21,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:21,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:21,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:21,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426848482] [2021-03-10 21:44:21,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:21,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:21,153 INFO L87 Difference]: Start difference. First operand 153 states and 396 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) [2021-03-10 21:44:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:21,553 INFO L93 Difference]: Finished difference Result 218 states and 493 transitions. [2021-03-10 21:44:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:21,553 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 [2021-03-10 21:44:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:21,554 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:44:21,554 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:44:21,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:44:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-03-10 21:44:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6129032258064515) internal successors, (405), 155 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 405 transitions. [2021-03-10 21:44:21,556 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 405 transitions. Word has length 15 [2021-03-10 21:44:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:21,557 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 405 transitions. [2021-03-10 21:44:21,557 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) [2021-03-10 21:44:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 405 transitions. [2021-03-10 21:44:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:21,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:21,557 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:21,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:21,757 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:21,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1325282152, now seen corresponding path program 78 times [2021-03-10 21:44:21,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:21,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906919527] [2021-03-10 21:44:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906919527] [2021-03-10 21:44:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992210633] [2021-03-10 21:44:21,831 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 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 [2021-03-10 21:44:21,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:21,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:21,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:21,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,941 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 [2021-03-10 21:44:21,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:21,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:21,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:21,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:21,983 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:21,983 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:21,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:21,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:22,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:22,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:22,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848024038] [2021-03-10 21:44:22,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:22,032 INFO L87 Difference]: Start difference. First operand 156 states and 405 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) [2021-03-10 21:44:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:22,317 INFO L93 Difference]: Finished difference Result 209 states and 484 transitions. [2021-03-10 21:44:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:22,318 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 [2021-03-10 21:44:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:22,319 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:44:22,319 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 21:44:22,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 21:44:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2021-03-10 21:44:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.585526315789474) internal successors, (393), 152 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) [2021-03-10 21:44:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 393 transitions. [2021-03-10 21:44:22,321 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 393 transitions. Word has length 15 [2021-03-10 21:44:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:22,321 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 393 transitions. [2021-03-10 21:44:22,321 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) [2021-03-10 21:44:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 393 transitions. [2021-03-10 21:44:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:22,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:22,321 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:22,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:22,522 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1164635520, now seen corresponding path program 79 times [2021-03-10 21:44:22,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:22,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058269210] [2021-03-10 21:44:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:44:22,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058269210] [2021-03-10 21:44:22,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933373918] [2021-03-10 21:44:22,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:44:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:22,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:22,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:22,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:22,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:22,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:22,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:22,724 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:22,724 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:22,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:22,725 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:22,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:22,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:22,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342515810] [2021-03-10 21:44:22,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:22,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:22,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:22,790 INFO L87 Difference]: Start difference. First operand 153 states and 393 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) [2021-03-10 21:44:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:23,087 INFO L93 Difference]: Finished difference Result 165 states and 411 transitions. [2021-03-10 21:44:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:44:23,087 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 [2021-03-10 21:44:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:23,088 INFO L225 Difference]: With dead ends: 165 [2021-03-10 21:44:23,088 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 21:44:23,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:44:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 21:44:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2021-03-10 21:44:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5723684210526314) internal successors, (391), 152 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 391 transitions. [2021-03-10 21:44:23,090 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 391 transitions. Word has length 15 [2021-03-10 21:44:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:23,090 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 391 transitions. [2021-03-10 21:44:23,090 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) [2021-03-10 21:44:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 391 transitions. [2021-03-10 21:44:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:23,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:23,091 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:23,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-03-10 21:44:23,295 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash 33405594, now seen corresponding path program 80 times [2021-03-10 21:44:23,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:23,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793245694] [2021-03-10 21:44:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793245694] [2021-03-10 21:44:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122519648] [2021-03-10 21:44:23,367 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 [2021-03-10 21:44:23,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:23,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:23,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:23,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,461 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 17 treesize of output 13 [2021-03-10 21:44:23,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,465 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 [2021-03-10 21:44:23,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:23,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:23,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:23,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:23,502 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:23,503 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:23,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:23,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:23,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:23,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:23,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556830870] [2021-03-10 21:44:23,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:23,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:23,552 INFO L87 Difference]: Start difference. First operand 153 states and 391 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) [2021-03-10 21:44:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:23,789 INFO L93 Difference]: Finished difference Result 281 states and 629 transitions. [2021-03-10 21:44:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:44:23,789 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 [2021-03-10 21:44:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:23,790 INFO L225 Difference]: With dead ends: 281 [2021-03-10 21:44:23,790 INFO L226 Difference]: Without dead ends: 280 [2021-03-10 21:44:23,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:44:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-03-10 21:44:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 176. [2021-03-10 21:44:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.6857142857142855) internal successors, (470), 175 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 470 transitions. [2021-03-10 21:44:23,793 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 470 transitions. Word has length 15 [2021-03-10 21:44:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:23,793 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 470 transitions. [2021-03-10 21:44:23,793 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) [2021-03-10 21:44:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 470 transitions. [2021-03-10 21:44:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:23,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:23,793 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:24,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable560 [2021-03-10 21:44:24,008 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash 835021822, now seen corresponding path program 81 times [2021-03-10 21:44:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:24,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696968495] [2021-03-10 21:44:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:24,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696968495] [2021-03-10 21:44:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132926309] [2021-03-10 21:44:24,079 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 [2021-03-10 21:44:24,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:24,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:24,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,182 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 [2021-03-10 21:44:24,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:24,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:24,186 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 [2021-03-10 21:44:24,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:24,222 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:24,222 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:24,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:24,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:24,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:24,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:24,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204419891] [2021-03-10 21:44:24,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:24,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:24,295 INFO L87 Difference]: Start difference. First operand 176 states and 470 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) [2021-03-10 21:44:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:24,719 INFO L93 Difference]: Finished difference Result 265 states and 600 transitions. [2021-03-10 21:44:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:44:24,720 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 [2021-03-10 21:44:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:24,720 INFO L225 Difference]: With dead ends: 265 [2021-03-10 21:44:24,720 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:44:24,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:44:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 180. [2021-03-10 21:44:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.6871508379888267) internal successors, (481), 179 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 481 transitions. [2021-03-10 21:44:24,723 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 481 transitions. Word has length 15 [2021-03-10 21:44:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:24,723 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 481 transitions. [2021-03-10 21:44:24,723 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) [2021-03-10 21:44:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 481 transitions. [2021-03-10 21:44:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:24,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:24,724 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:24,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-03-10 21:44:24,935 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:24,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1741601768, now seen corresponding path program 82 times [2021-03-10 21:44:24,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:24,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996086747] [2021-03-10 21:44:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996086747] [2021-03-10 21:44:25,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914799880] [2021-03-10 21:44:25,005 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 [2021-03-10 21:44:25,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:25,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:25,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:25,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,096 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 [2021-03-10 21:44:25,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,099 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 17 treesize of output 13 [2021-03-10 21:44:25,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,103 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 15 treesize of output 11 [2021-03-10 21:44:25,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,106 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 [2021-03-10 21:44:25,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,140 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:25,140 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:25,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:25,141 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:25,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344507331] [2021-03-10 21:44:25,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:25,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:25,187 INFO L87 Difference]: Start difference. First operand 180 states and 481 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:25,425 INFO L93 Difference]: Finished difference Result 246 states and 578 transitions. [2021-03-10 21:44:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:44:25,425 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 [2021-03-10 21:44:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:25,426 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:44:25,426 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:44:25,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:44:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:44:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 177. [2021-03-10 21:44:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.659090909090909) internal successors, (468), 176 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 468 transitions. [2021-03-10 21:44:25,429 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 468 transitions. Word has length 15 [2021-03-10 21:44:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:25,429 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 468 transitions. [2021-03-10 21:44:25,429 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) [2021-03-10 21:44:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 468 transitions. [2021-03-10 21:44:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:25,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:25,429 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:25,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-03-10 21:44:25,630 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash 842752220, now seen corresponding path program 83 times [2021-03-10 21:44:25,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:25,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857257371] [2021-03-10 21:44:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857257371] [2021-03-10 21:44:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212818456] [2021-03-10 21:44:25,686 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 [2021-03-10 21:44:25,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:25,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:25,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,805 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 [2021-03-10 21:44:25,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:25,808 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 16 treesize of output 12 [2021-03-10 21:44:25,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,830 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:25,830 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:25,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:25,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:25,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:25,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168622261] [2021-03-10 21:44:25,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:25,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:25,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:25,850 INFO L87 Difference]: Start difference. First operand 177 states and 468 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) [2021-03-10 21:44:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:25,995 INFO L93 Difference]: Finished difference Result 250 states and 588 transitions. [2021-03-10 21:44:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:25,996 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 [2021-03-10 21:44:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:25,997 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:44:25,997 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:44:25,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:44:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 177. [2021-03-10 21:44:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.659090909090909) internal successors, (468), 176 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 468 transitions. [2021-03-10 21:44:25,999 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 468 transitions. Word has length 15 [2021-03-10 21:44:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:25,999 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 468 transitions. [2021-03-10 21:44:25,999 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) [2021-03-10 21:44:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 468 transitions. [2021-03-10 21:44:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:25,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:25,999 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-03-10 21:44:26,200 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash 814015614, now seen corresponding path program 84 times [2021-03-10 21:44:26,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636145726] [2021-03-10 21:44:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636145726] [2021-03-10 21:44:26,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113916489] [2021-03-10 21:44:26,276 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:26,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:44:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:26,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:26,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,388 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 16 treesize of output 12 [2021-03-10 21:44:26,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:26,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,392 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 17 treesize of output 13 [2021-03-10 21:44:26,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:26,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:26,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:26,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:26,399 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 16 treesize of output 12 [2021-03-10 21:44:26,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:26,434 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:26,435 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:26,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:26,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:26,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473045730] [2021-03-10 21:44:26,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:26,505 INFO L87 Difference]: Start difference. First operand 177 states and 468 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) [2021-03-10 21:44:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,102 INFO L93 Difference]: Finished difference Result 257 states and 603 transitions. [2021-03-10 21:44:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:44:27,103 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 [2021-03-10 21:44:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,103 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:44:27,103 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:44:27,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:44:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:44:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 189. [2021-03-10 21:44:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.6968085106382977) internal successors, (507), 188 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 507 transitions. [2021-03-10 21:44:27,106 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 507 transitions. Word has length 15 [2021-03-10 21:44:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,106 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 507 transitions. [2021-03-10 21:44:27,106 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) [2021-03-10 21:44:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 507 transitions. [2021-03-10 21:44:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:27,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,107 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-03-10 21:44:27,315 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1762607976, now seen corresponding path program 85 times [2021-03-10 21:44:27,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625479308] [2021-03-10 21:44:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625479308] [2021-03-10 21:44:27,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845022235] [2021-03-10 21:44:27,386 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 [2021-03-10 21:44:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:27,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,497 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 [2021-03-10 21:44:27,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:27,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:27,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:27,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:27,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:27,540 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:27,540 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:27,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:27,541 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:27,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:27,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981648601] [2021-03-10 21:44:27,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:27,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:27,589 INFO L87 Difference]: Start difference. First operand 189 states and 507 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) [2021-03-10 21:44:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:28,014 INFO L93 Difference]: Finished difference Result 241 states and 586 transitions. [2021-03-10 21:44:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:28,015 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 [2021-03-10 21:44:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:28,015 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:44:28,015 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:44:28,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:44:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:44:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 186. [2021-03-10 21:44:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.675675675675676) internal successors, (495), 185 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 495 transitions. [2021-03-10 21:44:28,018 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 495 transitions. Word has length 15 [2021-03-10 21:44:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:28,018 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 495 transitions. [2021-03-10 21:44:28,018 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) [2021-03-10 21:44:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 495 transitions. [2021-03-10 21:44:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:28,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:28,019 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:28,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:28,231 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:28,231 INFO L82 PathProgramCache]: Analyzing trace with hash 821746012, now seen corresponding path program 86 times [2021-03-10 21:44:28,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:28,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756272344] [2021-03-10 21:44:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756272344] [2021-03-10 21:44:28,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212808189] [2021-03-10 21:44:28,303 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 [2021-03-10 21:44:28,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:28,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:28,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:28,432 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 15 treesize of output 11 [2021-03-10 21:44:28,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:28,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:28,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:28,459 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:28,459 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:28,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:28,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:28,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:28,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612422681] [2021-03-10 21:44:28,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:28,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:28,487 INFO L87 Difference]: Start difference. First operand 186 states and 495 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) [2021-03-10 21:44:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:28,899 INFO L93 Difference]: Finished difference Result 250 states and 610 transitions. [2021-03-10 21:44:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:28,899 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 [2021-03-10 21:44:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:28,900 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:44:28,900 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:44:28,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:44:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:44:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 183. [2021-03-10 21:44:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.659340659340659) internal successors, (484), 182 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 484 transitions. [2021-03-10 21:44:28,903 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 484 transitions. Word has length 15 [2021-03-10 21:44:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:28,903 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 484 transitions. [2021-03-10 21:44:28,903 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) [2021-03-10 21:44:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 484 transitions. [2021-03-10 21:44:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:28,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:28,903 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:29,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-03-10 21:44:29,115 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -667658984, now seen corresponding path program 87 times [2021-03-10 21:44:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:29,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878652576] [2021-03-10 21:44:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878652576] [2021-03-10 21:44:29,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681609405] [2021-03-10 21:44:29,181 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 [2021-03-10 21:44:29,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:29,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:29,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:29,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:29,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:29,310 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 [2021-03-10 21:44:29,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:29,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:29,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,336 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:29,336 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:29,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:29,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432841542] [2021-03-10 21:44:29,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:29,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:29,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:29,358 INFO L87 Difference]: Start difference. First operand 183 states and 484 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) [2021-03-10 21:44:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:29,499 INFO L93 Difference]: Finished difference Result 217 states and 544 transitions. [2021-03-10 21:44:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:29,500 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 [2021-03-10 21:44:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:29,501 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:44:29,501 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:44:29,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:44:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-03-10 21:44:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.659340659340659) internal successors, (484), 182 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 484 transitions. [2021-03-10 21:44:29,503 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 484 transitions. Word has length 15 [2021-03-10 21:44:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:29,503 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 484 transitions. [2021-03-10 21:44:29,503 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) [2021-03-10 21:44:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 484 transitions. [2021-03-10 21:44:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:29,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:29,503 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:29,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-03-10 21:44:29,716 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:29,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1814621922, now seen corresponding path program 88 times [2021-03-10 21:44:29,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:29,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890448202] [2021-03-10 21:44:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890448202] [2021-03-10 21:44:29,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352523391] [2021-03-10 21:44:29,785 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) [2021-03-10 21:44:29,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:29,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:29,910 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 [2021-03-10 21:44:29,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,913 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 [2021-03-10 21:44:29,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,931 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-03-10 21:44:29,931 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:29,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-03-10 21:44:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:29,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:44:29,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474533279] [2021-03-10 21:44:29,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:44:29,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:44:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:29,955 INFO L87 Difference]: Start difference. First operand 183 states and 484 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) [2021-03-10 21:44:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:30,104 INFO L93 Difference]: Finished difference Result 241 states and 610 transitions. [2021-03-10 21:44:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:44:30,104 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 [2021-03-10 21:44:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:30,105 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:44:30,105 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:44:30,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:44:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 182. [2021-03-10 21:44:30,107 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) [2021-03-10 21:44:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 483 transitions. [2021-03-10 21:44:30,107 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 483 transitions. Word has length 15 [2021-03-10 21:44:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:30,107 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 483 transitions. [2021-03-10 21:44:30,107 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) [2021-03-10 21:44:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 483 transitions. [2021-03-10 21:44:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:30,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:30,108 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:30,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:30,315 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1256099514, now seen corresponding path program 89 times [2021-03-10 21:44:30,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:30,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944212852] [2021-03-10 21:44:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944212852] [2021-03-10 21:44:30,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027645344] [2021-03-10 21:44:30,381 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 [2021-03-10 21:44:30,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:30,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:30,490 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 [2021-03-10 21:44:30,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:30,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:30,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:30,498 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 [2021-03-10 21:44:30,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:30,502 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 [2021-03-10 21:44:30,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:30,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:44:30,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:30,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:30,532 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-03-10 21:44:30,532 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:30,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:30,533 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-03-10 21:44:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:30,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:44:30,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330287148] [2021-03-10 21:44:30,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:44:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:44:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:30,560 INFO L87 Difference]: Start difference. First operand 182 states and 483 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) [2021-03-10 21:44:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:30,853 INFO L93 Difference]: Finished difference Result 238 states and 600 transitions. [2021-03-10 21:44:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:30,853 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 [2021-03-10 21:44:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:30,853 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:44:30,854 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:44:30,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:44:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 182. [2021-03-10 21:44:30,856 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) [2021-03-10 21:44:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 482 transitions. [2021-03-10 21:44:30,856 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 482 transitions. Word has length 15 [2021-03-10 21:44:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:30,856 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 482 transitions. [2021-03-10 21:44:30,856 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) [2021-03-10 21:44:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 482 transitions. [2021-03-10 21:44:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:30,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:30,856 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:31,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:31,059 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:31,059 INFO L82 PathProgramCache]: Analyzing trace with hash 237280192, now seen corresponding path program 90 times [2021-03-10 21:44:31,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:31,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687380204] [2021-03-10 21:44:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687380204] [2021-03-10 21:44:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036163798] [2021-03-10 21:44:31,124 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 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 [2021-03-10 21:44:31,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,251 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 [2021-03-10 21:44:31,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:31,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,277 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:31,277 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:31,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:31,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:31,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327278552] [2021-03-10 21:44:31,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:31,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:31,297 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) [2021-03-10 21:44:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:31,393 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2021-03-10 21:44:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:44:31,394 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 [2021-03-10 21:44:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:31,394 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:44:31,394 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:44:31,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:44:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 183. [2021-03-10 21:44:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6648351648351647) internal successors, (485), 182 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 485 transitions. [2021-03-10 21:44:31,396 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 485 transitions. Word has length 15 [2021-03-10 21:44:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:31,396 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 485 transitions. [2021-03-10 21:44:31,396 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) [2021-03-10 21:44:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 485 transitions. [2021-03-10 21:44:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:31,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:31,397 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:31,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:31,597 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:31,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1791329316, now seen corresponding path program 91 times [2021-03-10 21:44:31,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:31,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3407855] [2021-03-10 21:44:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3407855] [2021-03-10 21:44:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029790813] [2021-03-10 21:44:31,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:31,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,845 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 16 treesize of output 12 [2021-03-10 21:44:31,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:31,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:31,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:31,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:31,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:31,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:31,893 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:31,894 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:31,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:31,895 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:31,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:31,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942443119] [2021-03-10 21:44:31,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:31,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:31,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:31,923 INFO L87 Difference]: Start difference. First operand 183 states and 485 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) [2021-03-10 21:44:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:32,292 INFO L93 Difference]: Finished difference Result 240 states and 604 transitions. [2021-03-10 21:44:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:32,292 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 [2021-03-10 21:44:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:32,293 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:44:32,293 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:44:32,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:44:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:44:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2021-03-10 21:44:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.659340659340659) internal successors, (484), 182 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 484 transitions. [2021-03-10 21:44:32,295 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 484 transitions. Word has length 15 [2021-03-10 21:44:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:32,295 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 484 transitions. [2021-03-10 21:44:32,295 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) [2021-03-10 21:44:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 484 transitions. [2021-03-10 21:44:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:32,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:32,296 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:32,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:32,503 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:32,503 INFO L82 PathProgramCache]: Analyzing trace with hash 476922530, now seen corresponding path program 92 times [2021-03-10 21:44:32,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:32,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998254586] [2021-03-10 21:44:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998254586] [2021-03-10 21:44:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707955388] [2021-03-10 21:44:32,564 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 [2021-03-10 21:44:32,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:32,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:32,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:32,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:32,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:32,736 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:32,737 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:32,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:32,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:32,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:32,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100143060] [2021-03-10 21:44:32,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:32,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:32,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:32,757 INFO L87 Difference]: Start difference. First operand 183 states and 484 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) [2021-03-10 21:44:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:33,013 INFO L93 Difference]: Finished difference Result 257 states and 642 transitions. [2021-03-10 21:44:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:33,013 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 [2021-03-10 21:44:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:33,014 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:44:33,014 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:44:33,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:44:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 186. [2021-03-10 21:44:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.6648648648648647) internal successors, (493), 185 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 493 transitions. [2021-03-10 21:44:33,016 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 493 transitions. Word has length 15 [2021-03-10 21:44:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:33,016 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 493 transitions. [2021-03-10 21:44:33,016 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) [2021-03-10 21:44:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 493 transitions. [2021-03-10 21:44:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:33,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:33,017 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:33,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-03-10 21:44:33,231 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash -442778178, now seen corresponding path program 93 times [2021-03-10 21:44:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:33,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86692238] [2021-03-10 21:44:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86692238] [2021-03-10 21:44:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576940965] [2021-03-10 21:44:33,306 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 [2021-03-10 21:44:33,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:33,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:33,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:33,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:33,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:33,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:33,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:33,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:33,473 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 [2021-03-10 21:44:33,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:33,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:33,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:33,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:33,478 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:33,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:33,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:33,514 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:33,514 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:33,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:33,515 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:33,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:33,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:33,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502392232] [2021-03-10 21:44:33,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:33,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:33,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:33,544 INFO L87 Difference]: Start difference. First operand 186 states and 493 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) [2021-03-10 21:44:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:33,928 INFO L93 Difference]: Finished difference Result 248 states and 621 transitions. [2021-03-10 21:44:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:44:33,928 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 [2021-03-10 21:44:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:33,929 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:44:33,929 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:44:33,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:44:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:44:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 188. [2021-03-10 21:44:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.663101604278075) internal successors, (498), 187 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 498 transitions. [2021-03-10 21:44:33,931 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 498 transitions. Word has length 15 [2021-03-10 21:44:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:33,931 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 498 transitions. [2021-03-10 21:44:33,931 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) [2021-03-10 21:44:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 498 transitions. [2021-03-10 21:44:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:33,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:33,931 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-03-10 21:44:34,133 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash 484652928, now seen corresponding path program 94 times [2021-03-10 21:44:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243719912] [2021-03-10 21:44:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243719912] [2021-03-10 21:44:34,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885255253] [2021-03-10 21:44:34,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:34,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:34,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:34,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,317 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 [2021-03-10 21:44:34,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:34,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:34,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:34,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:34,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:34,358 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:34,358 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:34,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:34,359 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:34,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641100632] [2021-03-10 21:44:34,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:34,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:34,408 INFO L87 Difference]: Start difference. First operand 188 states and 498 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) [2021-03-10 21:44:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,842 INFO L93 Difference]: Finished difference Result 315 states and 729 transitions. [2021-03-10 21:44:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:44:34,842 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 [2021-03-10 21:44:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,843 INFO L225 Difference]: With dead ends: 315 [2021-03-10 21:44:34,843 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 21:44:34,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:44:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 21:44:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 191. [2021-03-10 21:44:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.6842105263157894) internal successors, (510), 190 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 510 transitions. [2021-03-10 21:44:34,845 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 510 transitions. Word has length 15 [2021-03-10 21:44:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,845 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 510 transitions. [2021-03-10 21:44:34,845 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) [2021-03-10 21:44:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 510 transitions. [2021-03-10 21:44:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:34,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,845 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:35,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:35,059 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1286269156, now seen corresponding path program 95 times [2021-03-10 21:44:35,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:35,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630355784] [2021-03-10 21:44:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630355784] [2021-03-10 21:44:35,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096437650] [2021-03-10 21:44:35,141 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) [2021-03-10 21:44:35,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:35,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:35,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:35,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:35,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:35,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,265 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 [2021-03-10 21:44:35,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:35,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:35,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:35,303 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:35,303 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:35,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:35,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:35,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:35,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566578354] [2021-03-10 21:44:35,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:35,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:35,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:35,369 INFO L87 Difference]: Start difference. First operand 191 states and 510 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) [2021-03-10 21:44:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:35,992 INFO L93 Difference]: Finished difference Result 281 states and 678 transitions. [2021-03-10 21:44:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:44:35,992 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 [2021-03-10 21:44:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:35,992 INFO L225 Difference]: With dead ends: 281 [2021-03-10 21:44:35,992 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 21:44:35,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:44:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 21:44:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 193. [2021-03-10 21:44:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.6875) internal successors, (516), 192 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 516 transitions. [2021-03-10 21:44:35,995 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 516 transitions. Word has length 15 [2021-03-10 21:44:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:35,995 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 516 transitions. [2021-03-10 21:44:35,995 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) [2021-03-10 21:44:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 516 transitions. [2021-03-10 21:44:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:35,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:35,995 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-03-10 21:44:36,196 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1290354434, now seen corresponding path program 96 times [2021-03-10 21:44:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098251284] [2021-03-10 21:44:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098251284] [2021-03-10 21:44:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882009328] [2021-03-10 21:44:36,272 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 [2021-03-10 21:44:36,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:36,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:36,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:36,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:36,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:36,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:36,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,383 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 17 treesize of output 13 [2021-03-10 21:44:36,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:36,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:36,387 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 [2021-03-10 21:44:36,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:36,423 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:36,423 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:36,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:36,423 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032834983] [2021-03-10 21:44:36,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:36,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:36,474 INFO L87 Difference]: Start difference. First operand 193 states and 516 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) [2021-03-10 21:44:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,812 INFO L93 Difference]: Finished difference Result 270 states and 662 transitions. [2021-03-10 21:44:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:36,812 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 [2021-03-10 21:44:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,813 INFO L225 Difference]: With dead ends: 270 [2021-03-10 21:44:36,813 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:44:36,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:44:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:44:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 190. [2021-03-10 21:44:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.671957671957672) internal successors, (505), 189 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 505 transitions. [2021-03-10 21:44:36,815 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 505 transitions. Word has length 15 [2021-03-10 21:44:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,815 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 505 transitions. [2021-03-10 21:44:36,815 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) [2021-03-10 21:44:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 505 transitions. [2021-03-10 21:44:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:36,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,816 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:37,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-03-10 21:44:37,016 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1950902984, now seen corresponding path program 97 times [2021-03-10 21:44:37,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:37,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592153048] [2021-03-10 21:44:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592153048] [2021-03-10 21:44:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498755577] [2021-03-10 21:44:37,077 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 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 [2021-03-10 21:44:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:37,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,202 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 [2021-03-10 21:44:37,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,225 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:37,225 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:37,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,226 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:37,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:37,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784519102] [2021-03-10 21:44:37,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:37,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:37,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:37,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:37,245 INFO L87 Difference]: Start difference. First operand 190 states and 505 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) [2021-03-10 21:44:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:37,370 INFO L93 Difference]: Finished difference Result 233 states and 591 transitions. [2021-03-10 21:44:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:37,370 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 [2021-03-10 21:44:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:37,371 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:44:37,371 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 21:44:37,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 21:44:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 195. [2021-03-10 21:44:37,372 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) [2021-03-10 21:44:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 518 transitions. [2021-03-10 21:44:37,373 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 518 transitions. Word has length 15 [2021-03-10 21:44:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:37,373 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 518 transitions. [2021-03-10 21:44:37,373 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) [2021-03-10 21:44:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 518 transitions. [2021-03-10 21:44:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:37,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:37,373 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:37,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-03-10 21:44:37,579 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash -396853860, now seen corresponding path program 98 times [2021-03-10 21:44:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:37,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956733678] [2021-03-10 21:44:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956733678] [2021-03-10 21:44:37,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410472834] [2021-03-10 21:44:37,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:44:37,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:37,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:37,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,793 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 [2021-03-10 21:44:37,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:37,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:37,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:37,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:37,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:37,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:37,850 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:37,850 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:37,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:37,851 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:37,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:37,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380001014] [2021-03-10 21:44:37,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:37,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:37,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:37,881 INFO L87 Difference]: Start difference. First operand 195 states and 518 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) [2021-03-10 21:44:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:38,150 INFO L93 Difference]: Finished difference Result 225 states and 568 transitions. [2021-03-10 21:44:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:38,150 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 [2021-03-10 21:44:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:38,151 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:44:38,151 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 21:44:38,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:44:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 21:44:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 196. [2021-03-10 21:44:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6564102564102563) internal successors, (518), 195 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) [2021-03-10 21:44:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 518 transitions. [2021-03-10 21:44:38,153 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 518 transitions. Word has length 15 [2021-03-10 21:44:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:38,153 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 518 transitions. [2021-03-10 21:44:38,153 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) [2021-03-10 21:44:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 518 transitions. [2021-03-10 21:44:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:38,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:38,154 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:38,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:38,354 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1711260646, now seen corresponding path program 99 times [2021-03-10 21:44:38,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:38,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832311580] [2021-03-10 21:44:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:38,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832311580] [2021-03-10 21:44:38,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428020480] [2021-03-10 21:44:38,429 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 [2021-03-10 21:44:38,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:38,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:38,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:38,553 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 [2021-03-10 21:44:38,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:38,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:38,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,580 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:38,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:38,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:38,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:38,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466074353] [2021-03-10 21:44:38,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:38,601 INFO L87 Difference]: Start difference. First operand 196 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) [2021-03-10 21:44:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:38,891 INFO L93 Difference]: Finished difference Result 232 states and 591 transitions. [2021-03-10 21:44:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:38,891 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 [2021-03-10 21:44:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:38,892 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:44:38,892 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:44:38,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:44:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:44:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 195. [2021-03-10 21:44:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.6752577319587627) internal successors, (519), 194 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 519 transitions. [2021-03-10 21:44:38,894 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 519 transitions. Word has length 15 [2021-03-10 21:44:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:38,894 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 519 transitions. [2021-03-10 21:44:38,894 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) [2021-03-10 21:44:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 519 transitions. [2021-03-10 21:44:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:38,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:38,895 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:39,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-03-10 21:44:39,095 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1664005942, now seen corresponding path program 100 times [2021-03-10 21:44:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:39,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093558640] [2021-03-10 21:44:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093558640] [2021-03-10 21:44:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884671801] [2021-03-10 21:44:39,175 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) [2021-03-10 21:44:39,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:39,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:39,338 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 8 treesize of output 6 [2021-03-10 21:44:39,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:39,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:39,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:39,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:39,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:39,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:39,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:39,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,360 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 [2021-03-10 21:44:39,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,399 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:39,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:39,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:39,400 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486820713] [2021-03-10 21:44:39,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:39,430 INFO L87 Difference]: Start difference. First operand 195 states and 519 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) [2021-03-10 21:44:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:39,664 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-03-10 21:44:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:39,664 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 [2021-03-10 21:44:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:39,665 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:44:39,665 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:44:39,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:44:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:44:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2021-03-10 21:44:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6717948717948716) internal successors, (521), 195 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 521 transitions. [2021-03-10 21:44:39,667 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 521 transitions. Word has length 15 [2021-03-10 21:44:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:39,667 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 521 transitions. [2021-03-10 21:44:39,667 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) [2021-03-10 21:44:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 521 transitions. [2021-03-10 21:44:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:39,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:39,668 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:39,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2021-03-10 21:44:39,883 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1703530248, now seen corresponding path program 101 times [2021-03-10 21:44:39,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:39,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734132822] [2021-03-10 21:44:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:39,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734132822] [2021-03-10 21:44:39,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729665561] [2021-03-10 21:44:39,955 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 [2021-03-10 21:44:39,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:44:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:40,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:40,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,060 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 17 treesize of output 13 [2021-03-10 21:44:40,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,064 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 16 treesize of output 12 [2021-03-10 21:44:40,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,100 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:40,100 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:40,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:40,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:40,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:40,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:40,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156188707] [2021-03-10 21:44:40,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:40,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:40,152 INFO L87 Difference]: Start difference. First operand 196 states and 521 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) [2021-03-10 21:44:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:40,495 INFO L93 Difference]: Finished difference Result 290 states and 678 transitions. [2021-03-10 21:44:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:40,496 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 [2021-03-10 21:44:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:40,496 INFO L225 Difference]: With dead ends: 290 [2021-03-10 21:44:40,496 INFO L226 Difference]: Without dead ends: 290 [2021-03-10 21:44:40,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-03-10 21:44:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 196. [2021-03-10 21:44:40,499 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) [2021-03-10 21:44:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 522 transitions. [2021-03-10 21:44:40,499 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 522 transitions. Word has length 15 [2021-03-10 21:44:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:40,499 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 522 transitions. [2021-03-10 21:44:40,499 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) [2021-03-10 21:44:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 522 transitions. [2021-03-10 21:44:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:40,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:40,499 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:40,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:40,714 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash -901914020, now seen corresponding path program 102 times [2021-03-10 21:44:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6473858] [2021-03-10 21:44:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:40,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6473858] [2021-03-10 21:44:40,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833903584] [2021-03-10 21:44:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:44:40,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:40,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:40,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:40,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:40,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,924 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 [2021-03-10 21:44:40,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:40,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:40,970 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:40,970 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:40,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:40,970 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:41,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:41,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131481678] [2021-03-10 21:44:41,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:41,042 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) [2021-03-10 21:44:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:41,392 INFO L93 Difference]: Finished difference Result 252 states and 617 transitions. [2021-03-10 21:44:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:44:41,392 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 [2021-03-10 21:44:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:41,393 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:44:41,393 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:44:41,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:44:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 200. [2021-03-10 21:44:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.6884422110552766) internal successors, (535), 199 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 535 transitions. [2021-03-10 21:44:41,395 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 535 transitions. Word has length 15 [2021-03-10 21:44:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:41,395 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 535 transitions. [2021-03-10 21:44:41,395 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) [2021-03-10 21:44:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 535 transitions. [2021-03-10 21:44:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:41,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:41,396 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:41,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:41,596 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:41,596 INFO L82 PathProgramCache]: Analyzing trace with hash 816429686, now seen corresponding path program 103 times [2021-03-10 21:44:41,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:41,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772815194] [2021-03-10 21:44:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:41,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772815194] [2021-03-10 21:44:41,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153287907] [2021-03-10 21:44:41,669 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 [2021-03-10 21:44:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:41,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:41,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:41,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,778 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 16 treesize of output 12 [2021-03-10 21:44:41,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:41,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,783 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 17 treesize of output 13 [2021-03-10 21:44:41,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:41,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:41,787 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 [2021-03-10 21:44:41,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:41,827 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:41,827 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:41,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:41,828 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977406126] [2021-03-10 21:44:41,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:41,879 INFO L87 Difference]: Start difference. First operand 200 states and 535 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) [2021-03-10 21:44:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:42,089 INFO L93 Difference]: Finished difference Result 250 states and 615 transitions. [2021-03-10 21:44:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:42,090 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 [2021-03-10 21:44:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:42,090 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:44:42,090 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:44:42,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:44:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 196. [2021-03-10 21:44:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6717948717948716) internal successors, (521), 195 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 521 transitions. [2021-03-10 21:44:42,092 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 521 transitions. Word has length 15 [2021-03-10 21:44:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:42,093 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 521 transitions. [2021-03-10 21:44:42,093 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) [2021-03-10 21:44:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 521 transitions. [2021-03-10 21:44:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:42,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:42,093 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:42,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-03-10 21:44:42,293 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash -638175266, now seen corresponding path program 104 times [2021-03-10 21:44:42,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:42,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598082664] [2021-03-10 21:44:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:42,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598082664] [2021-03-10 21:44:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423630674] [2021-03-10 21:44:42,354 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 [2021-03-10 21:44:42,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:42,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:42,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:42,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:42,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:42,491 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 [2021-03-10 21:44:42,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:42,515 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:42,515 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:42,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:42,516 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:42,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:42,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:42,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321695869] [2021-03-10 21:44:42,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:42,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:42,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:42,536 INFO L87 Difference]: Start difference. First operand 196 states and 521 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) [2021-03-10 21:44:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:42,766 INFO L93 Difference]: Finished difference Result 257 states and 637 transitions. [2021-03-10 21:44:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:42,766 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 [2021-03-10 21:44:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:42,767 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:44:42,767 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:44:42,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:44:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 199. [2021-03-10 21:44:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.686868686868687) internal successors, (532), 198 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) [2021-03-10 21:44:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 532 transitions. [2021-03-10 21:44:42,769 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 532 transitions. Word has length 15 [2021-03-10 21:44:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:42,769 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 532 transitions. [2021-03-10 21:44:42,769 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) [2021-03-10 21:44:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 532 transitions. [2021-03-10 21:44:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:42,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:42,769 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:42,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:42,970 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1557875974, now seen corresponding path program 105 times [2021-03-10 21:44:42,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:42,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544832824] [2021-03-10 21:44:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:43,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544832824] [2021-03-10 21:44:43,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841587788] [2021-03-10 21:44:43,034 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 [2021-03-10 21:44:43,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:43,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:43,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:43,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:43,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:43,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:43,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:43,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:43,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:43,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:43,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:43,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:43,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:43,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:43,214 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:43,215 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:43,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:43,229 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:43,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:43,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:43,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69567627] [2021-03-10 21:44:43,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:43,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:43,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:43,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:43,260 INFO L87 Difference]: Start difference. First operand 199 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) [2021-03-10 21:44:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:43,662 INFO L93 Difference]: Finished difference Result 232 states and 588 transitions. [2021-03-10 21:44:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:44:43,663 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 [2021-03-10 21:44:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:43,663 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:44:43,663 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:44:43,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:44:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:44:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 199. [2021-03-10 21:44:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.6717171717171717) internal successors, (529), 198 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) [2021-03-10 21:44:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 529 transitions. [2021-03-10 21:44:43,665 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 529 transitions. Word has length 15 [2021-03-10 21:44:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:43,666 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 529 transitions. [2021-03-10 21:44:43,666 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) [2021-03-10 21:44:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 529 transitions. [2021-03-10 21:44:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:43,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:43,666 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:43,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:43,866 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 977076318, now seen corresponding path program 106 times [2021-03-10 21:44:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:43,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823522719] [2021-03-10 21:44:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:43,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823522719] [2021-03-10 21:44:43,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890410425] [2021-03-10 21:44:43,942 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 [2021-03-10 21:44:43,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:43,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:43,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:44,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:44,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:44,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,043 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 [2021-03-10 21:44:44,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,047 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 [2021-03-10 21:44:44,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:44,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:44,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:44,092 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:44,092 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:44,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:44,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:44,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:44,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583865010] [2021-03-10 21:44:44,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:44,162 INFO L87 Difference]: Start difference. First operand 199 states and 529 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) [2021-03-10 21:44:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:44,638 INFO L93 Difference]: Finished difference Result 250 states and 608 transitions. [2021-03-10 21:44:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:44,639 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 [2021-03-10 21:44:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:44,639 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:44:44,639 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:44:44,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:44:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2021-03-10 21:44:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.6515151515151514) internal successors, (525), 198 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 525 transitions. [2021-03-10 21:44:44,641 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 525 transitions. Word has length 15 [2021-03-10 21:44:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:44,641 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 525 transitions. [2021-03-10 21:44:44,641 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) [2021-03-10 21:44:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 525 transitions. [2021-03-10 21:44:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:44,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:44,642 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:44,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:44,847 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:44,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2119849864, now seen corresponding path program 107 times [2021-03-10 21:44:44,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:44,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809093647] [2021-03-10 21:44:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:44,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809093647] [2021-03-10 21:44:44,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440250842] [2021-03-10 21:44:44,919 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 [2021-03-10 21:44:44,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:44,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:45,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:45,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:45,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:45,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,012 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 16 treesize of output 12 [2021-03-10 21:44:45,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,048 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:45,048 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:45,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:45,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:45,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:45,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:45,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898944938] [2021-03-10 21:44:45,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:45,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:45,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:45,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:45,096 INFO L87 Difference]: Start difference. First operand 199 states and 525 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) [2021-03-10 21:44:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:45,432 INFO L93 Difference]: Finished difference Result 330 states and 758 transitions. [2021-03-10 21:44:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:44:45,432 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 [2021-03-10 21:44:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:45,433 INFO L225 Difference]: With dead ends: 330 [2021-03-10 21:44:45,433 INFO L226 Difference]: Without dead ends: 330 [2021-03-10 21:44:45,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:44:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-03-10 21:44:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 210. [2021-03-10 21:44:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.712918660287081) internal successors, (567), 209 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 567 transitions. [2021-03-10 21:44:45,435 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 567 transitions. Word has length 15 [2021-03-10 21:44:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:45,435 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 567 transitions. [2021-03-10 21:44:45,435 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) [2021-03-10 21:44:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 567 transitions. [2021-03-10 21:44:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:45,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:45,436 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:45,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-03-10 21:44:45,636 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1318233636, now seen corresponding path program 108 times [2021-03-10 21:44:45,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:45,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532480315] [2021-03-10 21:44:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:45,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532480315] [2021-03-10 21:44:45,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640905239] [2021-03-10 21:44:45,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:45,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:45,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,805 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 [2021-03-10 21:44:45,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:45,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:45,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:45,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:45,861 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:45,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:45,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:45,862 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:45,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:45,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:45,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347813754] [2021-03-10 21:44:45,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:45,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:45,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:45,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:45,930 INFO L87 Difference]: Start difference. First operand 210 states and 567 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) [2021-03-10 21:44:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:46,645 INFO L93 Difference]: Finished difference Result 318 states and 736 transitions. [2021-03-10 21:44:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:44:46,645 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 [2021-03-10 21:44:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:46,646 INFO L225 Difference]: With dead ends: 318 [2021-03-10 21:44:46,646 INFO L226 Difference]: Without dead ends: 310 [2021-03-10 21:44:46,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:44:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-03-10 21:44:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 212. [2021-03-10 21:44:46,648 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) [2021-03-10 21:44:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 565 transitions. [2021-03-10 21:44:46,648 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 565 transitions. Word has length 15 [2021-03-10 21:44:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:46,649 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 565 transitions. [2021-03-10 21:44:46,649 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) [2021-03-10 21:44:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 565 transitions. [2021-03-10 21:44:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:46,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:46,649 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:46,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:46,849 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash 400110070, now seen corresponding path program 109 times [2021-03-10 21:44:46,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:46,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806591431] [2021-03-10 21:44:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:46,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806591431] [2021-03-10 21:44:46,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985274972] [2021-03-10 21:44:46,922 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 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 [2021-03-10 21:44:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:47,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:47,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,008 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 [2021-03-10 21:44:47,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,012 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 17 treesize of output 13 [2021-03-10 21:44:47,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:47,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,051 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:47,051 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:47,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:47,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:47,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:47,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108818078] [2021-03-10 21:44:47,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:47,101 INFO L87 Difference]: Start difference. First operand 212 states and 565 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) [2021-03-10 21:44:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:47,488 INFO L93 Difference]: Finished difference Result 300 states and 709 transitions. [2021-03-10 21:44:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:44:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:47,489 INFO L225 Difference]: With dead ends: 300 [2021-03-10 21:44:47,489 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 21:44:47,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:44:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 21:44:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 210. [2021-03-10 21:44:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.660287081339713) internal successors, (556), 209 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 556 transitions. [2021-03-10 21:44:47,492 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 556 transitions. Word has length 15 [2021-03-10 21:44:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:47,492 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 556 transitions. [2021-03-10 21:44:47,492 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) [2021-03-10 21:44:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 556 transitions. [2021-03-10 21:44:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:47,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:47,492 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:47,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:47,693 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:47,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:47,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1310503238, now seen corresponding path program 110 times [2021-03-10 21:44:47,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:47,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585584932] [2021-03-10 21:44:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585584932] [2021-03-10 21:44:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529477664] [2021-03-10 21:44:47,768 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 [2021-03-10 21:44:47,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:47,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:47,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:47,868 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 [2021-03-10 21:44:47,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,887 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:44:47,887 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:47,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,888 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:44:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:47,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:47,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:44:47,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327083181] [2021-03-10 21:44:47,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:47,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:47,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:47,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:47,910 INFO L87 Difference]: Start difference. First operand 210 states and 556 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) [2021-03-10 21:44:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:48,122 INFO L93 Difference]: Finished difference Result 305 states and 721 transitions. [2021-03-10 21:44:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:44:48,122 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 [2021-03-10 21:44:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:48,123 INFO L225 Difference]: With dead ends: 305 [2021-03-10 21:44:48,123 INFO L226 Difference]: Without dead ends: 305 [2021-03-10 21:44:48,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:44:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-03-10 21:44:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 197. [2021-03-10 21:44:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.5969387755102042) internal successors, (509), 196 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 509 transitions. [2021-03-10 21:44:48,129 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 509 transitions. Word has length 15 [2021-03-10 21:44:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:48,129 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 509 transitions. [2021-03-10 21:44:48,129 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) [2021-03-10 21:44:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 509 transitions. [2021-03-10 21:44:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:48,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:48,129 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:48,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable697,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:48,335 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1065104704, now seen corresponding path program 111 times [2021-03-10 21:44:48,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:48,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467570471] [2021-03-10 21:44:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:48,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467570471] [2021-03-10 21:44:48,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399070853] [2021-03-10 21:44:48,395 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 [2021-03-10 21:44:48,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:48,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:48,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:48,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:48,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:48,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:48,549 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 15 treesize of output 11 [2021-03-10 21:44:48,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:48,572 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:48,572 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:48,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:48,573 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:48,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:48,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:48,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550711697] [2021-03-10 21:44:48,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:48,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:48,593 INFO L87 Difference]: Start difference. First operand 197 states and 509 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) [2021-03-10 21:44:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:48,747 INFO L93 Difference]: Finished difference Result 282 states and 660 transitions. [2021-03-10 21:44:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:48,747 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 [2021-03-10 21:44:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:48,748 INFO L225 Difference]: With dead ends: 282 [2021-03-10 21:44:48,748 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:44:48,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:44:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 209. [2021-03-10 21:44:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.6298076923076925) internal successors, (547), 208 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 547 transitions. [2021-03-10 21:44:48,750 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 547 transitions. Word has length 15 [2021-03-10 21:44:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:48,750 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 547 transitions. [2021-03-10 21:44:48,750 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) [2021-03-10 21:44:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 547 transitions. [2021-03-10 21:44:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:48,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:48,751 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:48,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-03-10 21:44:48,966 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash 488944420, now seen corresponding path program 112 times [2021-03-10 21:44:48,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:48,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242091715] [2021-03-10 21:44:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:49,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242091715] [2021-03-10 21:44:49,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772758661] [2021-03-10 21:44:49,037 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 [2021-03-10 21:44:49,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:49,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:49,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:49,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:49,220 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 [2021-03-10 21:44:49,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:49,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:49,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:49,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:49,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:49,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:49,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:49,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:49,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:49,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:49,270 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:49,271 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:49,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:49,272 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:49,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:49,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869546201] [2021-03-10 21:44:49,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:49,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:49,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:49,302 INFO L87 Difference]: Start difference. First operand 209 states and 547 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) [2021-03-10 21:44:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:49,740 INFO L93 Difference]: Finished difference Result 262 states and 618 transitions. [2021-03-10 21:44:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:49,740 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 [2021-03-10 21:44:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:49,741 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:44:49,741 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:44:49,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:44:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:44:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 212. [2021-03-10 21:44:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.6113744075829386) internal successors, (551), 211 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) [2021-03-10 21:44:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 551 transitions. [2021-03-10 21:44:49,743 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 551 transitions. Word has length 15 [2021-03-10 21:44:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:49,743 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 551 transitions. [2021-03-10 21:44:49,744 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) [2021-03-10 21:44:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 551 transitions. [2021-03-10 21:44:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:49,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:49,744 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:49,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:49,944 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:49,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -825462366, now seen corresponding path program 113 times [2021-03-10 21:44:49,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:49,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134377537] [2021-03-10 21:44:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:50,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134377537] [2021-03-10 21:44:50,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403670074] [2021-03-10 21:44:50,019 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 [2021-03-10 21:44:50,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:50,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:50,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:50,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:50,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:50,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:50,161 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 [2021-03-10 21:44:50,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:50,184 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:50,185 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:50,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:50,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:50,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:50,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:50,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29252005] [2021-03-10 21:44:50,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:50,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:50,207 INFO L87 Difference]: Start difference. First operand 212 states and 551 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) [2021-03-10 21:44:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:50,679 INFO L93 Difference]: Finished difference Result 291 states and 678 transitions. [2021-03-10 21:44:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:50,679 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 [2021-03-10 21:44:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:50,680 INFO L225 Difference]: With dead ends: 291 [2021-03-10 21:44:50,680 INFO L226 Difference]: Without dead ends: 291 [2021-03-10 21:44:50,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:44:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-03-10 21:44:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 208. [2021-03-10 21:44:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.632850241545894) internal successors, (545), 207 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) [2021-03-10 21:44:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 545 transitions. [2021-03-10 21:44:50,682 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 545 transitions. Word has length 15 [2021-03-10 21:44:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:50,682 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 545 transitions. [2021-03-10 21:44:50,682 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) [2021-03-10 21:44:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 545 transitions. [2021-03-10 21:44:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:50,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:50,683 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:50,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:50,887 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1745163074, now seen corresponding path program 114 times [2021-03-10 21:44:50,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:50,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763008823] [2021-03-10 21:44:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:50,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763008823] [2021-03-10 21:44:50,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110059757] [2021-03-10 21:44:50,957 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 [2021-03-10 21:44:50,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:50,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:50,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:51,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:51,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:51,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:51,123 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 [2021-03-10 21:44:51,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:51,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:51,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:51,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:51,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:51,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,174 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:51,174 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:51,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:51,175 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:51,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:51,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:51,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145128752] [2021-03-10 21:44:51,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:51,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:51,205 INFO L87 Difference]: Start difference. First operand 208 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) [2021-03-10 21:44:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:51,723 INFO L93 Difference]: Finished difference Result 253 states and 608 transitions. [2021-03-10 21:44:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:44:51,724 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 [2021-03-10 21:44:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:51,725 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:44:51,725 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:44:51,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 467.8ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:44:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 209. [2021-03-10 21:44:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.6298076923076925) internal successors, (547), 208 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 547 transitions. [2021-03-10 21:44:51,728 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 547 transitions. Word has length 15 [2021-03-10 21:44:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:51,728 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 547 transitions. [2021-03-10 21:44:51,728 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) [2021-03-10 21:44:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 547 transitions. [2021-03-10 21:44:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:51,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:51,728 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:51,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-03-10 21:44:51,942 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:51,943 INFO L82 PathProgramCache]: Analyzing trace with hash -817731968, now seen corresponding path program 115 times [2021-03-10 21:44:51,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:51,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422048424] [2021-03-10 21:44:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:52,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422048424] [2021-03-10 21:44:52,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406712762] [2021-03-10 21:44:52,011 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 [2021-03-10 21:44:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:52,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:52,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:52,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:52,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,128 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 [2021-03-10 21:44:52,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:52,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,132 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 17 treesize of output 13 [2021-03-10 21:44:52,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:52,136 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 [2021-03-10 21:44:52,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:52,172 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:52,172 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:52,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:52,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:52,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:52,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:52,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006098894] [2021-03-10 21:44:52,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:52,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:52,225 INFO L87 Difference]: Start difference. First operand 209 states and 547 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) [2021-03-10 21:44:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:52,682 INFO L93 Difference]: Finished difference Result 298 states and 667 transitions. [2021-03-10 21:44:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:44:52,683 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 [2021-03-10 21:44:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:52,683 INFO L225 Difference]: With dead ends: 298 [2021-03-10 21:44:52,683 INFO L226 Difference]: Without dead ends: 297 [2021-03-10 21:44:52,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:44:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-03-10 21:44:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 200. [2021-03-10 21:44:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.592964824120603) internal successors, (516), 199 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 516 transitions. [2021-03-10 21:44:52,686 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 516 transitions. Word has length 15 [2021-03-10 21:44:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:52,686 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 516 transitions. [2021-03-10 21:44:52,686 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) [2021-03-10 21:44:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 516 transitions. [2021-03-10 21:44:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:52,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:52,686 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:52,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:52,887 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash -16115740, now seen corresponding path program 116 times [2021-03-10 21:44:52,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:52,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953127735] [2021-03-10 21:44:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:52,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953127735] [2021-03-10 21:44:52,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24491550] [2021-03-10 21:44:52,970 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) [2021-03-10 21:44:52,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:53,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:53,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:53,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:53,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:53,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:53,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:53,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:53,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:53,150 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:53,150 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:53,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:53,151 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:53,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153086533] [2021-03-10 21:44:53,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:53,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:53,225 INFO L87 Difference]: Start difference. First operand 200 states and 516 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) [2021-03-10 21:44:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:53,663 INFO L93 Difference]: Finished difference Result 263 states and 612 transitions. [2021-03-10 21:44:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:44:53,663 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 [2021-03-10 21:44:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:53,664 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:44:53,664 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:44:53,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:44:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 204. [2021-03-10 21:44:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.605911330049261) internal successors, (529), 203 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) [2021-03-10 21:44:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 529 transitions. [2021-03-10 21:44:53,666 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 529 transitions. Word has length 15 [2021-03-10 21:44:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:53,666 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 529 transitions. [2021-03-10 21:44:53,666 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) [2021-03-10 21:44:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 529 transitions. [2021-03-10 21:44:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:53,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:53,667 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:53,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:53,871 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:53,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1702227966, now seen corresponding path program 117 times [2021-03-10 21:44:53,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887283451] [2021-03-10 21:44:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:53,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887283451] [2021-03-10 21:44:53,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720927021] [2021-03-10 21:44:53,960 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) [2021-03-10 21:44:53,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:53,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:53,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:54,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:54,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,093 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 [2021-03-10 21:44:54,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:54,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:54,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,143 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:54,143 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:54,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:54,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:54,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:54,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109347681] [2021-03-10 21:44:54,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:54,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:54,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:54,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:54,200 INFO L87 Difference]: Start difference. First operand 204 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) [2021-03-10 21:44:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:54,526 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2021-03-10 21:44:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:54,526 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 [2021-03-10 21:44:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:54,527 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:44:54,527 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:44:54,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:44:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:44:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 189. [2021-03-10 21:44:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5851063829787235) internal successors, (486), 188 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 486 transitions. [2021-03-10 21:44:54,529 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 486 transitions. Word has length 15 [2021-03-10 21:44:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:54,529 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 486 transitions. [2021-03-10 21:44:54,529 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) [2021-03-10 21:44:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 486 transitions. [2021-03-10 21:44:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:54,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:54,529 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:54,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:54,739 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -846468574, now seen corresponding path program 118 times [2021-03-10 21:44:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:54,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471835300] [2021-03-10 21:44:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:54,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471835300] [2021-03-10 21:44:54,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893898749] [2021-03-10 21:44:54,788 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 [2021-03-10 21:44:54,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:54,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:54,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:54,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:54,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:54,924 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 16 treesize of output 12 [2021-03-10 21:44:54,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,948 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:44:54,948 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:54,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,949 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:44:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:54,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:54,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:54,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467727305] [2021-03-10 21:44:54,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:54,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:54,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:54,968 INFO L87 Difference]: Start difference. First operand 189 states and 486 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) [2021-03-10 21:44:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:55,160 INFO L93 Difference]: Finished difference Result 262 states and 614 transitions. [2021-03-10 21:44:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:44:55,160 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 [2021-03-10 21:44:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:55,161 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:44:55,161 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:44:55,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:44:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 195. [2021-03-10 21:44:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.6082474226804124) internal successors, (506), 194 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 506 transitions. [2021-03-10 21:44:55,163 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 506 transitions. Word has length 15 [2021-03-10 21:44:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:55,163 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 506 transitions. [2021-03-10 21:44:55,163 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) [2021-03-10 21:44:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 506 transitions. [2021-03-10 21:44:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:55,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:55,164 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:55,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:55,364 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1766169282, now seen corresponding path program 119 times [2021-03-10 21:44:55,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:55,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534186593] [2021-03-10 21:44:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:55,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534186593] [2021-03-10 21:44:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287734672] [2021-03-10 21:44:55,428 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 [2021-03-10 21:44:55,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:55,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:55,575 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 8 treesize of output 6 [2021-03-10 21:44:55,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:55,580 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 [2021-03-10 21:44:55,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:55,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:44:55,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:55,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:55,593 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 17 treesize of output 13 [2021-03-10 21:44:55,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:55,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,631 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:44:55,632 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:55,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:44:55,633 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:44:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:55,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:55,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:55,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106811438] [2021-03-10 21:44:55,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:55,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:55,662 INFO L87 Difference]: Start difference. First operand 195 states and 506 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) [2021-03-10 21:44:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:55,973 INFO L93 Difference]: Finished difference Result 238 states and 564 transitions. [2021-03-10 21:44:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:44:55,973 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 [2021-03-10 21:44:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:55,974 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:44:55,974 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:44:55,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:44:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 195. [2021-03-10 21:44:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.597938144329897) internal successors, (504), 194 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 504 transitions. [2021-03-10 21:44:55,976 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 504 transitions. Word has length 15 [2021-03-10 21:44:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:55,976 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 504 transitions. [2021-03-10 21:44:55,976 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) [2021-03-10 21:44:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 504 transitions. [2021-03-10 21:44:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:55,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:55,977 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:56,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:56,177 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -838738176, now seen corresponding path program 120 times [2021-03-10 21:44:56,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:56,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311959526] [2021-03-10 21:44:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:56,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311959526] [2021-03-10 21:44:56,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404762974] [2021-03-10 21:44:56,241 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 [2021-03-10 21:44:56,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:44:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:56,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:56,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,343 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 [2021-03-10 21:44:56,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:56,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:56,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:56,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,385 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:56,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:56,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:56,386 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:56,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:56,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:56,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825777615] [2021-03-10 21:44:56,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:56,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:56,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:56,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:56,435 INFO L87 Difference]: Start difference. First operand 195 states and 504 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) [2021-03-10 21:44:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:56,672 INFO L93 Difference]: Finished difference Result 283 states and 637 transitions. [2021-03-10 21:44:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:44:56,672 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 [2021-03-10 21:44:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:56,673 INFO L225 Difference]: With dead ends: 283 [2021-03-10 21:44:56,673 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:44:56,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:44:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:44:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 196. [2021-03-10 21:44:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.605128205128205) internal successors, (508), 195 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 508 transitions. [2021-03-10 21:44:56,675 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 508 transitions. Word has length 15 [2021-03-10 21:44:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:56,675 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 508 transitions. [2021-03-10 21:44:56,675 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) [2021-03-10 21:44:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 508 transitions. [2021-03-10 21:44:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:56,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:56,676 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:56,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:56,876 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:56,876 INFO L82 PathProgramCache]: Analyzing trace with hash -37121948, now seen corresponding path program 121 times [2021-03-10 21:44:56,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:56,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162203573] [2021-03-10 21:44:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:56,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162203573] [2021-03-10 21:44:56,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654736926] [2021-03-10 21:44:56,936 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 [2021-03-10 21:44:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:57,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:57,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:57,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:57,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:57,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,072 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:57,073 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:57,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:57,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:57,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:57,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686807359] [2021-03-10 21:44:57,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:57,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:57,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:57,146 INFO L87 Difference]: Start difference. First operand 196 states and 508 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) [2021-03-10 21:44:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:57,509 INFO L93 Difference]: Finished difference Result 263 states and 607 transitions. [2021-03-10 21:44:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:44:57,510 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 [2021-03-10 21:44:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:57,510 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:44:57,510 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:44:57,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:44:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:44:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 199. [2021-03-10 21:44:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.611111111111111) internal successors, (517), 198 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 517 transitions. [2021-03-10 21:44:57,512 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 517 transitions. Word has length 15 [2021-03-10 21:44:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:57,513 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 517 transitions. [2021-03-10 21:44:57,513 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) [2021-03-10 21:44:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 517 transitions. [2021-03-10 21:44:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:57,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:57,513 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:57,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-03-10 21:44:57,713 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1681221758, now seen corresponding path program 122 times [2021-03-10 21:44:57,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:57,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48614186] [2021-03-10 21:44:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:57,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48614186] [2021-03-10 21:44:57,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58037353] [2021-03-10 21:44:57,774 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 [2021-03-10 21:44:57,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:57,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,870 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 15 treesize of output 11 [2021-03-10 21:44:57,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,874 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 [2021-03-10 21:44:57,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:57,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:57,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:57,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,919 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:57,919 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:57,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:57,920 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:57,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:57,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:44:57,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828641200] [2021-03-10 21:44:57,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:44:57,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:44:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:57,971 INFO L87 Difference]: Start difference. First operand 199 states and 517 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) [2021-03-10 21:44:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:58,221 INFO L93 Difference]: Finished difference Result 249 states and 588 transitions. [2021-03-10 21:44:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:44:58,221 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 [2021-03-10 21:44:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:58,222 INFO L225 Difference]: With dead ends: 249 [2021-03-10 21:44:58,222 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:44:58,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:44:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 190. [2021-03-10 21:44:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.566137566137566) internal successors, (485), 189 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 485 transitions. [2021-03-10 21:44:58,224 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 485 transitions. Word has length 15 [2021-03-10 21:44:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:58,224 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 485 transitions. [2021-03-10 21:44:58,224 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) [2021-03-10 21:44:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 485 transitions. [2021-03-10 21:44:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:58,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:58,224 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:58,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:58,425 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash -453441564, now seen corresponding path program 123 times [2021-03-10 21:44:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:58,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191221369] [2021-03-10 21:44:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:58,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191221369] [2021-03-10 21:44:58,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009913604] [2021-03-10 21:44:58,514 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) [2021-03-10 21:44:58,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:44:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,645 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 [2021-03-10 21:44:58,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,650 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 [2021-03-10 21:44:58,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:58,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,655 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 [2021-03-10 21:44:58,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:58,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:58,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:58,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:58,701 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:58,701 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:58,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:58,702 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:58,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:58,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:58,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458779376] [2021-03-10 21:44:58,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:58,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:58,771 INFO L87 Difference]: Start difference. First operand 190 states and 485 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) [2021-03-10 21:44:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:59,287 INFO L93 Difference]: Finished difference Result 274 states and 624 transitions. [2021-03-10 21:44:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:44:59,287 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 [2021-03-10 21:44:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:59,288 INFO L225 Difference]: With dead ends: 274 [2021-03-10 21:44:59,288 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:44:59,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:44:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:44:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 200. [2021-03-10 21:44:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.6030150753768844) internal successors, (518), 199 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) [2021-03-10 21:44:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 518 transitions. [2021-03-10 21:44:59,290 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 518 transitions. Word has length 15 [2021-03-10 21:44:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:59,291 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 518 transitions. [2021-03-10 21:44:59,291 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) [2021-03-10 21:44:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 518 transitions. [2021-03-10 21:44:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:44:59,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:59,291 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:59,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-03-10 21:44:59,503 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1264902142, now seen corresponding path program 124 times [2021-03-10 21:44:59,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:59,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855805578] [2021-03-10 21:44:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:59,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855805578] [2021-03-10 21:44:59,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276202248] [2021-03-10 21:44:59,605 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 [2021-03-10 21:44:59,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:59,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:44:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:59,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,715 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 [2021-03-10 21:44:59,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,719 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 16 treesize of output 12 [2021-03-10 21:44:59,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,723 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 17 treesize of output 13 [2021-03-10 21:44:59,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:44:59,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,762 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:44:59,763 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:44:59,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:59,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:44:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:59,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:59,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:44:59,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093759907] [2021-03-10 21:44:59,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:59,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:59,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:59,814 INFO L87 Difference]: Start difference. First operand 200 states and 518 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) [2021-03-10 21:45:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:00,186 INFO L93 Difference]: Finished difference Result 258 states and 607 transitions. [2021-03-10 21:45:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:45:00,187 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 [2021-03-10 21:45:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:00,187 INFO L225 Difference]: With dead ends: 258 [2021-03-10 21:45:00,187 INFO L226 Difference]: Without dead ends: 258 [2021-03-10 21:45:00,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:45:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-03-10 21:45:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 197. [2021-03-10 21:45:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.5816326530612246) internal successors, (506), 196 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 506 transitions. [2021-03-10 21:45:00,189 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 506 transitions. Word has length 15 [2021-03-10 21:45:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:00,189 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 506 transitions. [2021-03-10 21:45:00,189 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) [2021-03-10 21:45:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 506 transitions. [2021-03-10 21:45:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:45:00,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:00,190 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:00,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-03-10 21:45:00,390 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash -445711166, now seen corresponding path program 125 times [2021-03-10 21:45:00,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:00,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508698636] [2021-03-10 21:45:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508698636] [2021-03-10 21:45:00,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088453976] [2021-03-10 21:45:00,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:45:00,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:45:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:45:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:00,590 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 15 treesize of output 11 [2021-03-10 21:45:00,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:00,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:45:00,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:00,613 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:45:00,613 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:00,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:00,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:45:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:00,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:00,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:45:00,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128128654] [2021-03-10 21:45:00,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:45:00,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:00,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:45:00,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:00,638 INFO L87 Difference]: Start difference. First operand 197 states and 506 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) [2021-03-10 21:45:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:01,117 INFO L93 Difference]: Finished difference Result 267 states and 631 transitions. [2021-03-10 21:45:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:45:01,117 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 [2021-03-10 21:45:01,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:01,118 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:45:01,118 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:45:01,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:45:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:45:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 194. [2021-03-10 21:45:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.564766839378238) internal successors, (495), 193 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 495 transitions. [2021-03-10 21:45:01,120 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 495 transitions. Word has length 15 [2021-03-10 21:45:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:01,120 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 495 transitions. [2021-03-10 21:45:01,120 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) [2021-03-10 21:45:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 495 transitions. [2021-03-10 21:45:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:45:01,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:01,120 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:01,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-03-10 21:45:01,336 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:01,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1935116162, now seen corresponding path program 126 times [2021-03-10 21:45:01,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:01,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721165590] [2021-03-10 21:45:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:01,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721165590] [2021-03-10 21:45:01,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594591734] [2021-03-10 21:45:01,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:45:01,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:45:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:01,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:45:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:01,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:01,521 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 15 treesize of output 11 [2021-03-10 21:45:01,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:01,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:01,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:45:01,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:01,544 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:45:01,544 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:01,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:01,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:45:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:01,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:01,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:45:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742861564] [2021-03-10 21:45:01,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:45:01,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:45:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:01,569 INFO L87 Difference]: Start difference. First operand 194 states and 495 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) [2021-03-10 21:45:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:01,746 INFO L93 Difference]: Finished difference Result 231 states and 559 transitions. [2021-03-10 21:45:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:45:01,747 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 [2021-03-10 21:45:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:01,747 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:45:01,747 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:45:01,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:45:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 188. [2021-03-10 21:45:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5614973262032086) internal successors, (479), 187 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) [2021-03-10 21:45:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 479 transitions. [2021-03-10 21:45:01,749 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 479 transitions. Word has length 15 [2021-03-10 21:45:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:01,749 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 479 transitions. [2021-03-10 21:45:01,749 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) [2021-03-10 21:45:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 479 transitions. [2021-03-10 21:45:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:01,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:01,750 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:01,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:01,950 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash 757370424, now seen corresponding path program 127 times [2021-03-10 21:45:01,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:01,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103042695] [2021-03-10 21:45:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103042695] [2021-03-10 21:45:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190661382] [2021-03-10 21:45:02,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:02,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:02,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:02,927 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 [2021-03-10 21:45:02,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:02,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:02,937 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 [2021-03-10 21:45:02,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:02,952 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-03-10 21:45:02,953 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-03-10 21:45:02,953 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:45:02,953 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:02,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:02,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:02,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:02,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 21:45:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327100456] [2021-03-10 21:45:02,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:02,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:02,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:02,962 INFO L87 Difference]: Start difference. First operand 188 states and 479 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) [2021-03-10 21:45:03,653 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-03-10 21:45:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:04,053 INFO L93 Difference]: Finished difference Result 314 states and 771 transitions. [2021-03-10 21:45:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:45:04,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:45:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:04,054 INFO L225 Difference]: With dead ends: 314 [2021-03-10 21:45:04,054 INFO L226 Difference]: Without dead ends: 311 [2021-03-10 21:45:04,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1461.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:45:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-03-10 21:45:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 199. [2021-03-10 21:45:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.5505050505050506) internal successors, (505), 198 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 505 transitions. [2021-03-10 21:45:04,057 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 505 transitions. Word has length 16 [2021-03-10 21:45:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:04,057 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 505 transitions. [2021-03-10 21:45:04,057 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) [2021-03-10 21:45:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 505 transitions. [2021-03-10 21:45:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:04,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:04,057 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:04,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-03-10 21:45:04,257 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1098862454, now seen corresponding path program 128 times [2021-03-10 21:45:04,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:04,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849094485] [2021-03-10 21:45:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:04,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849094485] [2021-03-10 21:45:04,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707713239] [2021-03-10 21:45:04,643 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 [2021-03-10 21:45:04,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:04,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:04,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:05,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:05,177 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 [2021-03-10 21:45:05,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:05,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-03-10 21:45:05,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:05,199 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 [2021-03-10 21:45:05,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:05,215 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-03-10 21:45:05,215 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:05,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:05,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-03-10 21:45:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:05,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:05,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:45:05,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75661819] [2021-03-10 21:45:05,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:45:05,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:45:05,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:05,255 INFO L87 Difference]: Start difference. First operand 199 states and 505 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) [2021-03-10 21:45:06,269 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-10 21:45:06,806 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2021-03-10 21:45:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:07,237 INFO L93 Difference]: Finished difference Result 351 states and 824 transitions. [2021-03-10 21:45:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:45:07,238 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 [2021-03-10 21:45:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:07,238 INFO L225 Difference]: With dead ends: 351 [2021-03-10 21:45:07,238 INFO L226 Difference]: Without dead ends: 342 [2021-03-10 21:45:07,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2230.9ms TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:45:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-03-10 21:45:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 234. [2021-03-10 21:45:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.643776824034335) internal successors, (616), 233 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 616 transitions. [2021-03-10 21:45:07,241 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 616 transitions. Word has length 16 [2021-03-10 21:45:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:07,241 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 616 transitions. [2021-03-10 21:45:07,241 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) [2021-03-10 21:45:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 616 transitions. [2021-03-10 21:45:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:07,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:07,242 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:07,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-03-10 21:45:07,442 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1091132056, now seen corresponding path program 129 times [2021-03-10 21:45:07,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:07,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858578063] [2021-03-10 21:45:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858578063] [2021-03-10 21:45:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062248813] [2021-03-10 21:45:07,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:45:07,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:45:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:07,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:08,123 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 [2021-03-10 21:45:08,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:08,144 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-03-10 21:45:08,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-03-10 21:45:08,145 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:08,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_74 vanished before elimination [2021-03-10 21:45:08,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:08,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:08,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:08,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:45:08,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000582842] [2021-03-10 21:45:08,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:08,173 INFO L87 Difference]: Start difference. First operand 234 states and 616 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) [2021-03-10 21:45:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:09,248 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2021-03-10 21:45:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:45:09,248 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 [2021-03-10 21:45:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:09,249 INFO L225 Difference]: With dead ends: 330 [2021-03-10 21:45:09,249 INFO L226 Difference]: Without dead ends: 326 [2021-03-10 21:45:09,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1244.9ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:45:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-03-10 21:45:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 252. [2021-03-10 21:45:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.697211155378486) internal successors, (677), 251 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 677 transitions. [2021-03-10 21:45:09,252 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 677 transitions. Word has length 16 [2021-03-10 21:45:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:09,252 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 677 transitions. [2021-03-10 21:45:09,252 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) [2021-03-10 21:45:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 677 transitions. [2021-03-10 21:45:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:09,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:09,252 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:09,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:09,453 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1714430244, now seen corresponding path program 130 times [2021-03-10 21:45:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:09,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643463911] [2021-03-10 21:45:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:09,728 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:45:09,851 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 21:45:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:10,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643463911] [2021-03-10 21:45:10,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867739479] [2021-03-10 21:45:10,027 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 [2021-03-10 21:45:10,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:10,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:10,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:10,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:10,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-03-10 21:45:10,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:10,511 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 [2021-03-10 21:45:10,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:10,528 INFO L628 ElimStorePlain]: treesize reduction 95, result has 10.4 percent of original size [2021-03-10 21:45:10,528 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:10,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-03-10 21:45:10,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-03-10 21:45:10,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:10,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:10,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:10,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:45:10,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258756370] [2021-03-10 21:45:10,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:45:10,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:10,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:45:10,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:10,562 INFO L87 Difference]: Start difference. First operand 252 states and 677 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) [2021-03-10 21:45:11,403 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-03-10 21:45:11,601 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 21:45:11,808 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-03-10 21:45:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:12,253 INFO L93 Difference]: Finished difference Result 314 states and 801 transitions. [2021-03-10 21:45:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:45:12,254 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 [2021-03-10 21:45:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:12,254 INFO L225 Difference]: With dead ends: 314 [2021-03-10 21:45:12,254 INFO L226 Difference]: Without dead ends: 310 [2021-03-10 21:45:12,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2136.3ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:45:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-03-10 21:45:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 261. [2021-03-10 21:45:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.703846153846154) internal successors, (703), 260 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 703 transitions. [2021-03-10 21:45:12,257 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 703 transitions. Word has length 16 [2021-03-10 21:45:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:12,257 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 703 transitions. [2021-03-10 21:45:12,257 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) [2021-03-10 21:45:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 703 transitions. [2021-03-10 21:45:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:12,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:12,257 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:12,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:12,458 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1507451672, now seen corresponding path program 131 times [2021-03-10 21:45:12,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:12,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681441898] [2021-03-10 21:45:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:12,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681441898] [2021-03-10 21:45:12,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951142395] [2021-03-10 21:45:12,665 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 [2021-03-10 21:45:12,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:45:12,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:12,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:13,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:13,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:13,133 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 [2021-03-10 21:45:13,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:13,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:13,141 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 [2021-03-10 21:45:13,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:13,156 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-03-10 21:45:13,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-03-10 21:45:13,157 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:45:13,157 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:13,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:13,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:13,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:13,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:45:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042326562] [2021-03-10 21:45:13,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:13,189 INFO L87 Difference]: Start difference. First operand 261 states and 703 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) [2021-03-10 21:45:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:14,215 INFO L93 Difference]: Finished difference Result 318 states and 813 transitions. [2021-03-10 21:45:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:45:14,216 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 [2021-03-10 21:45:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:14,217 INFO L225 Difference]: With dead ends: 318 [2021-03-10 21:45:14,217 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 21:45:14,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:45:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 21:45:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 261. [2021-03-10 21:45:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.703846153846154) internal successors, (703), 260 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 703 transitions. [2021-03-10 21:45:14,219 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 703 transitions. Word has length 16 [2021-03-10 21:45:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:14,220 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 703 transitions. [2021-03-10 21:45:14,220 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) [2021-03-10 21:45:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 703 transitions. [2021-03-10 21:45:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:14,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:14,220 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:14,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-03-10 21:45:14,435 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:14,435 INFO L82 PathProgramCache]: Analyzing trace with hash 608535494, now seen corresponding path program 132 times [2021-03-10 21:45:14,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:14,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729123304] [2021-03-10 21:45:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729123304] [2021-03-10 21:45:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274362355] [2021-03-10 21:45:14,741 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 [2021-03-10 21:45:14,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:45:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:14,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:15,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:15,251 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 [2021-03-10 21:45:15,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:15,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:15,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:15,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:45:15,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:15,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:45:15,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:15,282 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-03-10 21:45:15,282 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:15,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:15,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:45:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:15,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:15,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026006851] [2021-03-10 21:45:15,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:15,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:15,309 INFO L87 Difference]: Start difference. First operand 261 states and 703 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) [2021-03-10 21:45:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:16,482 INFO L93 Difference]: Finished difference Result 363 states and 891 transitions. [2021-03-10 21:45:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:45:16,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:45:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:16,483 INFO L225 Difference]: With dead ends: 363 [2021-03-10 21:45:16,483 INFO L226 Difference]: Without dead ends: 356 [2021-03-10 21:45:16,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1521.3ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:45:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-03-10 21:45:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 280. [2021-03-10 21:45:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.7132616487455197) internal successors, (757), 279 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 757 transitions. [2021-03-10 21:45:16,486 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 757 transitions. Word has length 16 [2021-03-10 21:45:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:16,486 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 757 transitions. [2021-03-10 21:45:16,486 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) [2021-03-10 21:45:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 757 transitions. [2021-03-10 21:45:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:16,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:16,486 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:16,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:16,688 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 855908230, now seen corresponding path program 133 times [2021-03-10 21:45:16,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:16,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521770095] [2021-03-10 21:45:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:16,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521770095] [2021-03-10 21:45:16,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698496912] [2021-03-10 21:45:16,847 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 [2021-03-10 21:45:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:16,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:17,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:17,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:17,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:17,450 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 [2021-03-10 21:45:17,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:17,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:17,459 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 43 treesize of output 31 [2021-03-10 21:45:17,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,475 INFO L628 ElimStorePlain]: treesize reduction 95, result has 10.4 percent of original size [2021-03-10 21:45:17,476 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:45:17,476 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:17,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-03-10 21:45:17,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-03-10 21:45:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:17,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:17,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 21:45:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998963469] [2021-03-10 21:45:17,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:45:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:45:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:17,493 INFO L87 Difference]: Start difference. First operand 280 states and 757 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) [2021-03-10 21:45:17,792 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 21:45:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:18,362 INFO L93 Difference]: Finished difference Result 371 states and 936 transitions. [2021-03-10 21:45:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:45:18,363 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 [2021-03-10 21:45:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:18,363 INFO L225 Difference]: With dead ends: 371 [2021-03-10 21:45:18,363 INFO L226 Difference]: Without dead ends: 367 [2021-03-10 21:45:18,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1176.0ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:45:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-03-10 21:45:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 294. [2021-03-10 21:45:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.744027303754266) internal successors, (804), 293 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) [2021-03-10 21:45:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 804 transitions. [2021-03-10 21:45:18,366 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 804 transitions. Word has length 16 [2021-03-10 21:45:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:18,366 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 804 transitions. [2021-03-10 21:45:18,366 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) [2021-03-10 21:45:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 804 transitions. [2021-03-10 21:45:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:18,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:18,367 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:18,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-03-10 21:45:18,567 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:18,568 INFO L82 PathProgramCache]: Analyzing trace with hash 439588614, now seen corresponding path program 134 times [2021-03-10 21:45:18,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:18,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310870506] [2021-03-10 21:45:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:18,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310870506] [2021-03-10 21:45:18,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401847683] [2021-03-10 21:45:18,801 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 [2021-03-10 21:45:18,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:18,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:19,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:19,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:19,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:19,366 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 [2021-03-10 21:45:19,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:19,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:19,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:19,377 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 [2021-03-10 21:45:19,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:19,395 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-03-10 21:45:19,395 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:19,395 INFO L518 ElimStorePlain]: Eliminatee v_prenex_89 vanished before elimination [2021-03-10 21:45:19,395 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-03-10 21:45:19,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:19,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:19,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:19,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:45:19,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942842652] [2021-03-10 21:45:19,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:19,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:19,430 INFO L87 Difference]: Start difference. First operand 294 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) [2021-03-10 21:45:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:20,191 INFO L93 Difference]: Finished difference Result 381 states and 982 transitions. [2021-03-10 21:45:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:45:20,191 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 [2021-03-10 21:45:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:20,192 INFO L225 Difference]: With dead ends: 381 [2021-03-10 21:45:20,192 INFO L226 Difference]: Without dead ends: 377 [2021-03-10 21:45:20,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1081.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:45:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-03-10 21:45:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 309. [2021-03-10 21:45:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.7467532467532467) internal successors, (846), 308 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 846 transitions. [2021-03-10 21:45:20,195 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 846 transitions. Word has length 16 [2021-03-10 21:45:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:20,195 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 846 transitions. [2021-03-10 21:45:20,195 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) [2021-03-10 21:45:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 846 transitions. [2021-03-10 21:45:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:20,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:20,196 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:20,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable908 [2021-03-10 21:45:20,396 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash 827171624, now seen corresponding path program 135 times [2021-03-10 21:45:20,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:20,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806771713] [2021-03-10 21:45:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:20,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806771713] [2021-03-10 21:45:20,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088687870] [2021-03-10 21:45:20,808 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 [2021-03-10 21:45:20,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:45:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:20,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,397 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 [2021-03-10 21:45:21,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,410 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 [2021-03-10 21:45:21,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-03-10 21:45:21,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:21,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:21,430 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 [2021-03-10 21:45:21,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:21,450 INFO L628 ElimStorePlain]: treesize reduction 73, result has 17.0 percent of original size [2021-03-10 21:45:21,450 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:21,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:21,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:11 [2021-03-10 21:45:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:21,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:21,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:45:21,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710876003] [2021-03-10 21:45:21,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:45:21,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:45:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:21,484 INFO L87 Difference]: Start difference. First operand 309 states and 846 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) [2021-03-10 21:45:22,435 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-10 21:45:22,757 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-03-10 21:45:22,901 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-10 21:45:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:23,155 INFO L93 Difference]: Finished difference Result 412 states and 1047 transitions. [2021-03-10 21:45:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:45:23,156 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 [2021-03-10 21:45:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:23,157 INFO L225 Difference]: With dead ends: 412 [2021-03-10 21:45:23,157 INFO L226 Difference]: Without dead ends: 406 [2021-03-10 21:45:23,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1939.3ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:45:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-03-10 21:45:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 308. [2021-03-10 21:45:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.762214983713355) internal successors, (848), 307 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 848 transitions. [2021-03-10 21:45:23,160 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 848 transitions. Word has length 16 [2021-03-10 21:45:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:23,160 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 848 transitions. [2021-03-10 21:45:23,160 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) [2021-03-10 21:45:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 848 transitions. [2021-03-10 21:45:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:23,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:23,161 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:23,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable924,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:23,361 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash 418582406, now seen corresponding path program 136 times [2021-03-10 21:45:23,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:23,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461017820] [2021-03-10 21:45:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461017820] [2021-03-10 21:45:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941516640] [2021-03-10 21:45:23,534 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 [2021-03-10 21:45:23,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:23,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:24,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:24,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:24,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:24,021 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 [2021-03-10 21:45:24,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:24,043 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-03-10 21:45:24,043 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:24,043 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-03-10 21:45:24,043 INFO L518 ElimStorePlain]: Eliminatee v_prenex_95 vanished before elimination [2021-03-10 21:45:24,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:24,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:24,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:45:24,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171787288] [2021-03-10 21:45:24,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:24,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:24,056 INFO L87 Difference]: Start difference. First operand 308 states and 848 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) [2021-03-10 21:45:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:24,878 INFO L93 Difference]: Finished difference Result 350 states and 929 transitions. [2021-03-10 21:45:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:45:24,878 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 [2021-03-10 21:45:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:24,879 INFO L225 Difference]: With dead ends: 350 [2021-03-10 21:45:24,879 INFO L226 Difference]: Without dead ends: 347 [2021-03-10 21:45:24,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 958.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:45:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-03-10 21:45:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 308. [2021-03-10 21:45:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.762214983713355) internal successors, (848), 307 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 848 transitions. [2021-03-10 21:45:24,882 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 848 transitions. Word has length 16 [2021-03-10 21:45:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:24,882 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 848 transitions. [2021-03-10 21:45:24,882 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) [2021-03-10 21:45:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 848 transitions. [2021-03-10 21:45:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:24,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:24,883 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:25,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable954,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:25,084 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1998264330, now seen corresponding path program 137 times [2021-03-10 21:45:25,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:25,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356508659] [2021-03-10 21:45:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356508659] [2021-03-10 21:45:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269735643] [2021-03-10 21:45:25,495 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 [2021-03-10 21:45:25,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:45:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:25,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:25,906 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 [2021-03-10 21:45:25,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:25,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:25,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:25,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:45:25,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:25,922 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 [2021-03-10 21:45:25,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:25,939 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-03-10 21:45:25,939 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:25,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:25,940 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:45:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:25,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:25,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017305961] [2021-03-10 21:45:25,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:25,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:25,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:25,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:25,970 INFO L87 Difference]: Start difference. First operand 308 states and 848 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) [2021-03-10 21:45:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:26,531 INFO L93 Difference]: Finished difference Result 345 states and 921 transitions. [2021-03-10 21:45:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:45:26,532 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 [2021-03-10 21:45:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:26,533 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:45:26,533 INFO L226 Difference]: Without dead ends: 336 [2021-03-10 21:45:26,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1027.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:45:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-03-10 21:45:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 313. [2021-03-10 21:45:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.75) internal successors, (858), 312 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 858 transitions. [2021-03-10 21:45:26,536 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 858 transitions. Word has length 16 [2021-03-10 21:45:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:26,536 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 858 transitions. [2021-03-10 21:45:26,536 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) [2021-03-10 21:45:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 858 transitions. [2021-03-10 21:45:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:26,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:26,536 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:26,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-03-10 21:45:26,751 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1076884554, now seen corresponding path program 138 times [2021-03-10 21:45:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:26,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118086804] [2021-03-10 21:45:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:26,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118086804] [2021-03-10 21:45:26,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206563380] [2021-03-10 21:45:26,995 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 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 [2021-03-10 21:45:27,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:45:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:27,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:27,366 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 21:45:27,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:27,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:27,520 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 [2021-03-10 21:45:27,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:27,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:27,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:27,529 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 [2021-03-10 21:45:27,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:27,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:27,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:45:27,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:27,552 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-03-10 21:45:27,552 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:27,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:27,553 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:45:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:27,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:27,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310766316] [2021-03-10 21:45:27,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:27,579 INFO L87 Difference]: Start difference. First operand 313 states and 858 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) [2021-03-10 21:45:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:28,174 INFO L93 Difference]: Finished difference Result 387 states and 992 transitions. [2021-03-10 21:45:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:45:28,175 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 [2021-03-10 21:45:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:28,176 INFO L225 Difference]: With dead ends: 387 [2021-03-10 21:45:28,176 INFO L226 Difference]: Without dead ends: 381 [2021-03-10 21:45:28,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 978.0ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:45:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-03-10 21:45:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 327. [2021-03-10 21:45:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.776073619631902) internal successors, (905), 326 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 905 transitions. [2021-03-10 21:45:28,179 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 905 transitions. Word has length 16 [2021-03-10 21:45:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:28,179 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 905 transitions. [2021-03-10 21:45:28,179 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) [2021-03-10 21:45:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 905 transitions. [2021-03-10 21:45:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:28,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:28,180 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:28,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable990 [2021-03-10 21:45:28,380 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1084614952, now seen corresponding path program 139 times [2021-03-10 21:45:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:28,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458551095] [2021-03-10 21:45:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:28,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458551095] [2021-03-10 21:45:28,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253802000] [2021-03-10 21:45:28,875 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 [2021-03-10 21:45:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:28,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:29,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:29,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:29,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 21:45:29,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,476 INFO L628 ElimStorePlain]: treesize reduction 125, result has 8.1 percent of original size [2021-03-10 21:45:29,477 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-03-10 21:45:29,477 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:29,477 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-03-10 21:45:29,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-03-10 21:45:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:29,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:29,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:45:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019688561] [2021-03-10 21:45:29,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:45:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:45:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:29,514 INFO L87 Difference]: Start difference. First operand 327 states and 905 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) [2021-03-10 21:45:30,269 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-03-10 21:45:30,451 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-03-10 21:45:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:30,938 INFO L93 Difference]: Finished difference Result 397 states and 1034 transitions. [2021-03-10 21:45:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:45:30,939 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 [2021-03-10 21:45:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:30,940 INFO L225 Difference]: With dead ends: 397 [2021-03-10 21:45:30,940 INFO L226 Difference]: Without dead ends: 391 [2021-03-10 21:45:30,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1862.8ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:45:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-10 21:45:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2021-03-10 21:45:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.7886904761904763) internal successors, (937), 336 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 937 transitions. [2021-03-10 21:45:30,944 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 937 transitions. Word has length 16 [2021-03-10 21:45:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:30,944 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 937 transitions. [2021-03-10 21:45:30,944 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) [2021-03-10 21:45:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 937 transitions. [2021-03-10 21:45:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:30,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:30,944 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:31,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:31,145 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash -425796252, now seen corresponding path program 140 times [2021-03-10 21:45:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:31,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896092372] [2021-03-10 21:45:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:31,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896092372] [2021-03-10 21:45:31,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786866268] [2021-03-10 21:45:31,592 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 [2021-03-10 21:45:31,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:31,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:31,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:31,869 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 21:45:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:32,230 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 [2021-03-10 21:45:32,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,238 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 [2021-03-10 21:45:32,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:32,295 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-03-10 21:45:32,296 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:32,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:32,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:32,302 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 [2021-03-10 21:45:32,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:32,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:32,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:32,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:45:32,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:32,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:32,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:45:32,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-03-10 21:45:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:32,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:32,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:32,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141974007] [2021-03-10 21:45:32,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:32,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:32,381 INFO L87 Difference]: Start difference. First operand 337 states and 937 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) [2021-03-10 21:45:32,834 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-03-10 21:45:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:33,779 INFO L93 Difference]: Finished difference Result 388 states and 1041 transitions. [2021-03-10 21:45:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:45:33,780 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 [2021-03-10 21:45:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:33,780 INFO L225 Difference]: With dead ends: 388 [2021-03-10 21:45:33,780 INFO L226 Difference]: Without dead ends: 382 [2021-03-10 21:45:33,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1896.5ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:45:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-03-10 21:45:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 344. [2021-03-10 21:45:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.7871720116618075) internal successors, (956), 343 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 956 transitions. [2021-03-10 21:45:33,784 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 956 transitions. Word has length 16 [2021-03-10 21:45:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:33,784 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 956 transitions. [2021-03-10 21:45:33,784 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) [2021-03-10 21:45:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 956 transitions. [2021-03-10 21:45:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:33,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:33,784 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:33,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-03-10 21:45:33,999 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:33,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1210590856, now seen corresponding path program 141 times [2021-03-10 21:45:33,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:33,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696168841] [2021-03-10 21:45:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:34,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696168841] [2021-03-10 21:45:34,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738668823] [2021-03-10 21:45:34,094 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 [2021-03-10 21:45:34,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:45:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:45:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:34,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,223 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 [2021-03-10 21:45:34,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:34,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:34,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:34,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:34,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:34,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:34,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:45:34,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:34,281 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:45:34,281 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:34,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:45:34,282 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:45:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:34,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:34,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:45:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93545494] [2021-03-10 21:45:34,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:34,368 INFO L87 Difference]: Start difference. First operand 344 states and 956 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) [2021-03-10 21:45:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:34,627 INFO L93 Difference]: Finished difference Result 398 states and 1046 transitions. [2021-03-10 21:45:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:45:34,628 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 [2021-03-10 21:45:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:34,629 INFO L225 Difference]: With dead ends: 398 [2021-03-10 21:45:34,629 INFO L226 Difference]: Without dead ends: 396 [2021-03-10 21:45:34,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:45:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-03-10 21:45:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 348. [2021-03-10 21:45:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7953890489913547) internal successors, (970), 347 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 970 transitions. [2021-03-10 21:45:34,632 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 970 transitions. Word has length 16 [2021-03-10 21:45:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:34,632 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 970 transitions. [2021-03-10 21:45:34,632 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) [2021-03-10 21:45:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 970 transitions. [2021-03-10 21:45:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:34,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:34,633 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:34,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1046 [2021-03-10 21:45:34,833 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1076988700, now seen corresponding path program 142 times [2021-03-10 21:45:34,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:34,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378732955] [2021-03-10 21:45:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:35,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378732955] [2021-03-10 21:45:35,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167494580] [2021-03-10 21:45:35,205 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 [2021-03-10 21:45:35,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:35,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:35,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:35,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:35,697 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 [2021-03-10 21:45:35,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,720 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-03-10 21:45:35,720 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:45:35,720 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:35,720 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-03-10 21:45:35,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:35,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:35,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:35,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272738250] [2021-03-10 21:45:35,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:35,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:35,758 INFO L87 Difference]: Start difference. First operand 348 states and 970 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) [2021-03-10 21:45:36,469 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 21:45:36,618 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-03-10 21:45:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:36,900 INFO L93 Difference]: Finished difference Result 377 states and 1027 transitions. [2021-03-10 21:45:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:45:36,901 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 [2021-03-10 21:45:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:36,902 INFO L225 Difference]: With dead ends: 377 [2021-03-10 21:45:36,902 INFO L226 Difference]: Without dead ends: 373 [2021-03-10 21:45:36,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1542.5ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:45:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-03-10 21:45:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-03-10 21:45:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.7994350282485874) internal successors, (991), 354 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 991 transitions. [2021-03-10 21:45:36,905 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 991 transitions. Word has length 16 [2021-03-10 21:45:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:36,905 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 991 transitions. [2021-03-10 21:45:36,905 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) [2021-03-10 21:45:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 991 transitions. [2021-03-10 21:45:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:36,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:36,906 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:37,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:37,106 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash -3903320, now seen corresponding path program 143 times [2021-03-10 21:45:37,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:37,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395117442] [2021-03-10 21:45:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:37,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395117442] [2021-03-10 21:45:37,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7141610] [2021-03-10 21:45:37,489 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 [2021-03-10 21:45:37,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:45:37,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:37,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:38,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:38,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:38,033 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 [2021-03-10 21:45:38,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:38,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:38,045 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 [2021-03-10 21:45:38,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:38,101 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-03-10 21:45:38,102 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:38,108 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 [2021-03-10 21:45:38,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:38,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:38,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:38,127 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 21 treesize of output 13 [2021-03-10 21:45:38,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:38,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:38,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:45:38,142 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-03-10 21:45:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:38,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:38,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-10 21:45:38,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546149730] [2021-03-10 21:45:38,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:38,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:38,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:38,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:38,169 INFO L87 Difference]: Start difference. First operand 355 states and 991 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) [2021-03-10 21:45:39,011 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 21:45:39,206 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-10 21:45:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:39,340 INFO L93 Difference]: Finished difference Result 390 states and 1057 transitions. [2021-03-10 21:45:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:45:39,341 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 [2021-03-10 21:45:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:39,342 INFO L225 Difference]: With dead ends: 390 [2021-03-10 21:45:39,342 INFO L226 Difference]: Without dead ends: 387 [2021-03-10 21:45:39,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1529.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:45:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-10 21:45:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 355. [2021-03-10 21:45:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.7994350282485874) internal successors, (991), 354 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 991 transitions. [2021-03-10 21:45:39,346 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 991 transitions. Word has length 16 [2021-03-10 21:45:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:39,346 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 991 transitions. [2021-03-10 21:45:39,346 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) [2021-03-10 21:45:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 991 transitions. [2021-03-10 21:45:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:39,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:39,346 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:39,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-03-10 21:45:39,561 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:39,561 INFO L82 PathProgramCache]: Analyzing trace with hash 439009666, now seen corresponding path program 144 times [2021-03-10 21:45:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:39,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303964923] [2021-03-10 21:45:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303964923] [2021-03-10 21:45:39,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769467695] [2021-03-10 21:45:39,899 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 [2021-03-10 21:45:39,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:45:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:39,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:40,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:40,482 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 [2021-03-10 21:45:40,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:40,507 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-03-10 21:45:40,508 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:45:40,508 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:40,508 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-03-10 21:45:40,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:40,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:40,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:40,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:40,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022878426] [2021-03-10 21:45:40,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:40,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:40,541 INFO L87 Difference]: Start difference. First operand 355 states and 991 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) [2021-03-10 21:45:41,337 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-03-10 21:45:41,563 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-03-10 21:45:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:41,728 INFO L93 Difference]: Finished difference Result 518 states and 1407 transitions. [2021-03-10 21:45:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:45:41,728 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 [2021-03-10 21:45:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:41,729 INFO L225 Difference]: With dead ends: 518 [2021-03-10 21:45:41,729 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 21:45:41,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1507.1ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:45:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 21:45:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 357. [2021-03-10 21:45:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.794943820224719) internal successors, (995), 356 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 995 transitions. [2021-03-10 21:45:41,733 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 995 transitions. Word has length 16 [2021-03-10 21:45:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:41,733 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 995 transitions. [2021-03-10 21:45:41,733 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) [2021-03-10 21:45:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 995 transitions. [2021-03-10 21:45:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:41,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:41,734 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:41,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:41,934 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1213943708, now seen corresponding path program 145 times [2021-03-10 21:45:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:41,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825913393] [2021-03-10 21:45:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:42,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825913393] [2021-03-10 21:45:42,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924304270] [2021-03-10 21:45:42,460 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 [2021-03-10 21:45:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:42,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:43,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:43,144 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 [2021-03-10 21:45:43,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,153 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 [2021-03-10 21:45:43,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:43,212 INFO L628 ElimStorePlain]: treesize reduction 80, result has 49.7 percent of original size [2021-03-10 21:45:43,212 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:43,218 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 [2021-03-10 21:45:43,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:43,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:43,239 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 21 treesize of output 13 [2021-03-10 21:45:43,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:43,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:43,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:45:43,257 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:221, output treesize:22 [2021-03-10 21:45:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:43,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:43,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:45:43,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461553912] [2021-03-10 21:45:43,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:45:43,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:45:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:43,305 INFO L87 Difference]: Start difference. First operand 357 states and 995 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) [2021-03-10 21:45:43,973 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-03-10 21:45:44,158 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 21:45:44,376 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 21:45:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:44,550 INFO L93 Difference]: Finished difference Result 412 states and 1109 transitions. [2021-03-10 21:45:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:45:44,551 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 [2021-03-10 21:45:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:44,551 INFO L225 Difference]: With dead ends: 412 [2021-03-10 21:45:44,551 INFO L226 Difference]: Without dead ends: 406 [2021-03-10 21:45:44,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1777.6ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:45:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-03-10 21:45:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 357. [2021-03-10 21:45:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.794943820224719) internal successors, (995), 356 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 995 transitions. [2021-03-10 21:45:44,555 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 995 transitions. Word has length 16 [2021-03-10 21:45:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:44,555 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 995 transitions. [2021-03-10 21:45:44,555 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) [2021-03-10 21:45:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 995 transitions. [2021-03-10 21:45:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:44,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:44,556 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:44,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-03-10 21:45:44,770 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1920001474, now seen corresponding path program 146 times [2021-03-10 21:45:44,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:44,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321731271] [2021-03-10 21:45:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:45,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321731271] [2021-03-10 21:45:45,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884240992] [2021-03-10 21:45:45,185 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 [2021-03-10 21:45:45,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:45,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:45,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:45,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:45,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:45,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:45,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:45,797 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 [2021-03-10 21:45:45,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:45,824 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-03-10 21:45:45,824 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:45:45,825 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:45,825 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-03-10 21:45:45,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:45,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:45,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:45,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 21:45:45,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634188340] [2021-03-10 21:45:45,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:45,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:45,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:45,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:45,838 INFO L87 Difference]: Start difference. First operand 357 states and 995 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) [2021-03-10 21:45:46,064 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 21:45:46,240 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 21:45:46,372 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 21:45:46,847 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-03-10 21:45:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:47,314 INFO L93 Difference]: Finished difference Result 416 states and 1122 transitions. [2021-03-10 21:45:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:45:47,315 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 [2021-03-10 21:45:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:47,315 INFO L225 Difference]: With dead ends: 416 [2021-03-10 21:45:47,315 INFO L226 Difference]: Without dead ends: 410 [2021-03-10 21:45:47,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1865.9ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:45:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-10 21:45:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 364. [2021-03-10 21:45:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.796143250688705) internal successors, (1015), 363 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1015 transitions. [2021-03-10 21:45:47,319 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1015 transitions. Word has length 16 [2021-03-10 21:45:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:47,319 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1015 transitions. [2021-03-10 21:45:47,319 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) [2021-03-10 21:45:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1015 transitions. [2021-03-10 21:45:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:47,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:47,320 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:47,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-03-10 21:45:47,535 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2135323484, now seen corresponding path program 147 times [2021-03-10 21:45:47,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:47,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175310804] [2021-03-10 21:45:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:48,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175310804] [2021-03-10 21:45:48,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092006549] [2021-03-10 21:45:48,107 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 [2021-03-10 21:45:48,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:45:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:48,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:45:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:48,873 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 21:45:49,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:49,055 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 [2021-03-10 21:45:49,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:49,181 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 75 [2021-03-10 21:45:49,182 INFO L628 ElimStorePlain]: treesize reduction 177, result has 47.5 percent of original size [2021-03-10 21:45:49,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,190 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 [2021-03-10 21:45:49,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:49,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:49,235 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-03-10 21:45:49,235 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-03-10 21:45:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,243 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 [2021-03-10 21:45:49,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:49,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:49,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_132 vanished before elimination [2021-03-10 21:45:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:49,285 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 10 treesize of output 6 [2021-03-10 21:45:49,287 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:49,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:49,329 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 [2021-03-10 21:45:49,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:49,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:49,361 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-03-10 21:45:49,361 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-03-10 21:45:49,361 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-03-10 21:45:49,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:45:49,363 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 18 variables, input treesize:370, output treesize:39 [2021-03-10 21:45:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:49,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:49,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-03-10 21:45:49,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513568660] [2021-03-10 21:45:49,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:45:49,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:45:49,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:45:49,422 INFO L87 Difference]: Start difference. First operand 364 states and 1015 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) [2021-03-10 21:45:49,858 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-10 21:45:50,294 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-10 21:45:50,681 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-03-10 21:45:51,135 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 21:45:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:51,240 INFO L93 Difference]: Finished difference Result 469 states and 1219 transitions. [2021-03-10 21:45:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:45:51,241 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 [2021-03-10 21:45:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:51,242 INFO L225 Difference]: With dead ends: 469 [2021-03-10 21:45:51,242 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 21:45:51,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2563.0ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:45:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 21:45:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 378. [2021-03-10 21:45:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.8143236074270557) internal successors, (1061), 377 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1061 transitions. [2021-03-10 21:45:51,246 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1061 transitions. Word has length 16 [2021-03-10 21:45:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:51,246 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 1061 transitions. [2021-03-10 21:45:51,246 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) [2021-03-10 21:45:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1061 transitions. [2021-03-10 21:45:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:51,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:51,246 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:51,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-03-10 21:45:51,447 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:51,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2127593086, now seen corresponding path program 148 times [2021-03-10 21:45:51,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:51,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660451620] [2021-03-10 21:45:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660451620] [2021-03-10 21:45:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442010311] [2021-03-10 21:45:51,781 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 [2021-03-10 21:45:51,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:51,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:52,266 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 21:45:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,489 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 [2021-03-10 21:45:52,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,506 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 53 treesize of output 39 [2021-03-10 21:45:52,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:52,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,522 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 [2021-03-10 21:45:52,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:52,533 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 33 treesize of output 23 [2021-03-10 21:45:52,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:52,559 INFO L628 ElimStorePlain]: treesize reduction 87, result has 14.7 percent of original size [2021-03-10 21:45:52,560 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:52,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:52,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:205, output treesize:11 [2021-03-10 21:45:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:52,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:52,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:45:52,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550010322] [2021-03-10 21:45:52,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:52,602 INFO L87 Difference]: Start difference. First operand 378 states and 1061 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) [2021-03-10 21:45:53,076 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-10 21:45:53,370 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-10 21:45:53,643 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 21:45:53,844 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 21:45:54,279 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 21:45:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:54,520 INFO L93 Difference]: Finished difference Result 506 states and 1336 transitions. [2021-03-10 21:45:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:45:54,521 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 [2021-03-10 21:45:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:54,522 INFO L225 Difference]: With dead ends: 506 [2021-03-10 21:45:54,522 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 21:45:54,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2222.5ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:45:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 21:45:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 402. [2021-03-10 21:45:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.855361596009975) internal successors, (1145), 401 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1145 transitions. [2021-03-10 21:45:54,527 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1145 transitions. Word has length 16 [2021-03-10 21:45:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:54,527 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1145 transitions. [2021-03-10 21:45:54,527 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) [2021-03-10 21:45:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1145 transitions. [2021-03-10 21:45:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:54,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:54,527 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:54,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1150,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:54,728 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash -328145428, now seen corresponding path program 149 times [2021-03-10 21:45:54,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:54,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259744620] [2021-03-10 21:45:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:55,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259744620] [2021-03-10 21:45:55,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764089102] [2021-03-10 21:45:55,106 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 [2021-03-10 21:45:55,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:45:55,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:55,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:55,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:55,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-03-10 21:45:55,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:55,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:55,799 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 [2021-03-10 21:45:55,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,821 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-03-10 21:45:55,821 INFO L518 ElimStorePlain]: Eliminatee v_prenex_150 vanished before elimination [2021-03-10 21:45:55,821 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:55,821 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-03-10 21:45:55,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:55,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:55,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 21:45:55,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012672177] [2021-03-10 21:45:55,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:55,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:55,836 INFO L87 Difference]: Start difference. First operand 402 states and 1145 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) [2021-03-10 21:45:56,035 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 21:45:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:56,619 INFO L93 Difference]: Finished difference Result 439 states and 1221 transitions. [2021-03-10 21:45:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:45:56,620 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 [2021-03-10 21:45:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:56,621 INFO L225 Difference]: With dead ends: 439 [2021-03-10 21:45:56,621 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 21:45:56,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1318.7ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:45:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 21:45:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 402. [2021-03-10 21:45:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.855361596009975) internal successors, (1145), 401 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1145 transitions. [2021-03-10 21:45:56,625 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1145 transitions. Word has length 16 [2021-03-10 21:45:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:56,626 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1145 transitions. [2021-03-10 21:45:56,626 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) [2021-03-10 21:45:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1145 transitions. [2021-03-10 21:45:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:56,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:56,626 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:56,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-03-10 21:45:56,835 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1249525204, now seen corresponding path program 150 times [2021-03-10 21:45:56,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:56,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709843104] [2021-03-10 21:45:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:57,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709843104] [2021-03-10 21:45:57,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465644246] [2021-03-10 21:45:57,104 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 [2021-03-10 21:45:57,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:45:57,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:57,126 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:57,585 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 21:45:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:57,869 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 [2021-03-10 21:45:57,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:45:57,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:57,883 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 [2021-03-10 21:45:57,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,908 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-03-10 21:45:57,908 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:57,908 INFO L518 ElimStorePlain]: Eliminatee v_prenex_153 vanished before elimination [2021-03-10 21:45:57,908 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-03-10 21:45:57,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:45:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:57,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:57,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:45:57,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363366723] [2021-03-10 21:45:57,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:57,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:57,946 INFO L87 Difference]: Start difference. First operand 402 states and 1145 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) [2021-03-10 21:45:58,641 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-10 21:45:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:58,905 INFO L93 Difference]: Finished difference Result 509 states and 1347 transitions. [2021-03-10 21:45:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:45:58,906 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 [2021-03-10 21:45:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:58,906 INFO L225 Difference]: With dead ends: 509 [2021-03-10 21:45:58,906 INFO L226 Difference]: Without dead ends: 503 [2021-03-10 21:45:58,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1384.9ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:45:58,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-03-10 21:45:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 399. [2021-03-10 21:45:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.849246231155779) internal successors, (1134), 398 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1134 transitions. [2021-03-10 21:45:58,911 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1134 transitions. Word has length 16 [2021-03-10 21:45:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:58,911 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1134 transitions. [2021-03-10 21:45:58,911 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) [2021-03-10 21:45:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1134 transitions. [2021-03-10 21:45:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:45:58,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:58,911 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:59,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:59,112 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:59,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1241794806, now seen corresponding path program 151 times [2021-03-10 21:45:59,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:59,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865449621] [2021-03-10 21:45:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:59,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865449621] [2021-03-10 21:45:59,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810347050] [2021-03-10 21:45:59,654 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 [2021-03-10 21:45:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:59,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:45:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:00,248 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 21:46:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,492 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 [2021-03-10 21:46:00,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,512 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 [2021-03-10 21:46:00,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,533 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 33 treesize of output 23 [2021-03-10 21:46:00,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:00,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:00,545 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 [2021-03-10 21:46:00,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,577 INFO L628 ElimStorePlain]: treesize reduction 75, result has 16.7 percent of original size [2021-03-10 21:46:00,577 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:00,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:11 [2021-03-10 21:46:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:00,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:00,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:46:00,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325662846] [2021-03-10 21:46:00,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:46:00,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:46:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:46:00,633 INFO L87 Difference]: Start difference. First operand 399 states and 1134 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) [2021-03-10 21:46:01,075 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 21:46:01,379 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-03-10 21:46:01,544 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 21:46:01,967 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 21:46:02,261 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-03-10 21:46:02,501 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-10 21:46:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:03,060 INFO L93 Difference]: Finished difference Result 498 states and 1330 transitions. [2021-03-10 21:46:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:46:03,061 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 [2021-03-10 21:46:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:03,061 INFO L225 Difference]: With dead ends: 498 [2021-03-10 21:46:03,061 INFO L226 Difference]: Without dead ends: 492 [2021-03-10 21:46:03,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2877.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:46:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-10 21:46:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 400. [2021-03-10 21:46:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.8596491228070176) internal successors, (1141), 399 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1141 transitions. [2021-03-10 21:46:03,066 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1141 transitions. Word has length 16 [2021-03-10 21:46:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:03,066 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1141 transitions. [2021-03-10 21:46:03,066 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) [2021-03-10 21:46:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1141 transitions. [2021-03-10 21:46:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:03,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:03,066 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:03,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1211,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:03,267 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1711708166, now seen corresponding path program 152 times [2021-03-10 21:46:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:03,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668800748] [2021-03-10 21:46:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:03,645 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:46:03,771 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 21:46:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:03,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668800748] [2021-03-10 21:46:03,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693565558] [2021-03-10 21:46:03,909 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 [2021-03-10 21:46:03,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:03,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:04,284 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 21:46:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:04,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:04,789 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 [2021-03-10 21:46:04,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:04,802 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 [2021-03-10 21:46:04,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:04,866 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.4 percent of original size [2021-03-10 21:46:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:04,873 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 [2021-03-10 21:46:04,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:04,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:04,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_161 vanished before elimination [2021-03-10 21:46:04,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:04,898 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 21 treesize of output 13 [2021-03-10 21:46:04,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:04,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:04,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:04,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-03-10 21:46:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:04,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:04,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:46:04,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781595259] [2021-03-10 21:46:04,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:46:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:46:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:46:04,975 INFO L87 Difference]: Start difference. First operand 400 states and 1141 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) [2021-03-10 21:46:05,267 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 21:46:05,621 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-10 21:46:06,033 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 21:46:06,426 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-03-10 21:46:06,610 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-03-10 21:46:06,934 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 21:46:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:06,988 INFO L93 Difference]: Finished difference Result 434 states and 1196 transitions. [2021-03-10 21:46:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:46:06,989 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 [2021-03-10 21:46:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:06,990 INFO L225 Difference]: With dead ends: 434 [2021-03-10 21:46:06,990 INFO L226 Difference]: Without dead ends: 425 [2021-03-10 21:46:06,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2781.3ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:46:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-10 21:46:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 400. [2021-03-10 21:46:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.8596491228070176) internal successors, (1141), 399 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1141 transitions. [2021-03-10 21:46:06,994 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1141 transitions. Word has length 16 [2021-03-10 21:46:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:06,994 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1141 transitions. [2021-03-10 21:46:06,994 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) [2021-03-10 21:46:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1141 transitions. [2021-03-10 21:46:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:06,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:06,995 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:07,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1240,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:07,195 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:07,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1270531412, now seen corresponding path program 153 times [2021-03-10 21:46:07,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:07,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352786902] [2021-03-10 21:46:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:07,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352786902] [2021-03-10 21:46:07,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767726171] [2021-03-10 21:46:07,526 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 [2021-03-10 21:46:07,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:46:07,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:07,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:07,829 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:46:08,144 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 21:46:08,324 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 21:46:08,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:08,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:08,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:08,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 21:46:08,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:08,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:08,459 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 45 treesize of output 33 [2021-03-10 21:46:08,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,480 INFO L628 ElimStorePlain]: treesize reduction 95, result has 10.4 percent of original size [2021-03-10 21:46:08,481 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:08,481 INFO L518 ElimStorePlain]: Eliminatee v_prenex_163 vanished before elimination [2021-03-10 21:46:08,481 INFO L518 ElimStorePlain]: Eliminatee v_prenex_164 vanished before elimination [2021-03-10 21:46:08,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-03-10 21:46:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:08,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:08,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 21:46:08,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991103482] [2021-03-10 21:46:08,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:08,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:08,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:08,494 INFO L87 Difference]: Start difference. First operand 400 states and 1141 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) [2021-03-10 21:46:08,833 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 21:46:09,069 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 21:46:09,697 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 21:46:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:09,906 INFO L93 Difference]: Finished difference Result 469 states and 1255 transitions. [2021-03-10 21:46:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:46:09,908 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 [2021-03-10 21:46:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:09,908 INFO L225 Difference]: With dead ends: 469 [2021-03-10 21:46:09,908 INFO L226 Difference]: Without dead ends: 464 [2021-03-10 21:46:09,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2042.5ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:46:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-10 21:46:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 382. [2021-03-10 21:46:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8346456692913384) internal successors, (1080), 381 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1080 transitions. [2021-03-10 21:46:09,912 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1080 transitions. Word has length 16 [2021-03-10 21:46:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:09,912 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1080 transitions. [2021-03-10 21:46:09,913 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) [2021-03-10 21:46:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1080 transitions. [2021-03-10 21:46:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:09,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:09,913 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:10,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-03-10 21:46:10,114 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:10,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1542761286, now seen corresponding path program 154 times [2021-03-10 21:46:10,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:10,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913840391] [2021-03-10 21:46:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:10,620 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-03-10 21:46:10,798 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-03-10 21:46:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:10,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913840391] [2021-03-10 21:46:10,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746884543] [2021-03-10 21:46:10,955 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 [2021-03-10 21:46:10,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:10,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:10,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:11,363 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 21:46:11,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,845 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 [2021-03-10 21:46:11,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-03-10 21:46:11,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:11,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,871 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 [2021-03-10 21:46:11,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:11,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:11,878 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 [2021-03-10 21:46:11,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:11,909 INFO L628 ElimStorePlain]: treesize reduction 73, result has 17.0 percent of original size [2021-03-10 21:46:11,909 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:11,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:11,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:181, output treesize:11 [2021-03-10 21:46:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:11,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:11,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:46:11,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869042897] [2021-03-10 21:46:11,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:46:11,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:46:11,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:46:11,961 INFO L87 Difference]: Start difference. First operand 382 states and 1080 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) [2021-03-10 21:46:12,506 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-03-10 21:46:12,703 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-03-10 21:46:12,967 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-03-10 21:46:13,145 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-10 21:46:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:13,241 INFO L93 Difference]: Finished difference Result 412 states and 1142 transitions. [2021-03-10 21:46:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:13,242 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 [2021-03-10 21:46:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:13,242 INFO L225 Difference]: With dead ends: 412 [2021-03-10 21:46:13,242 INFO L226 Difference]: Without dead ends: 409 [2021-03-10 21:46:13,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2370.8ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:46:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-03-10 21:46:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 383. [2021-03-10 21:46:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.832460732984293) internal successors, (1082), 382 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1082 transitions. [2021-03-10 21:46:13,246 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1082 transitions. Word has length 16 [2021-03-10 21:46:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:13,246 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1082 transitions. [2021-03-10 21:46:13,246 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) [2021-03-10 21:46:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1082 transitions. [2021-03-10 21:46:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:13,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:13,247 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:13,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1273 [2021-03-10 21:46:13,447 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:13,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1361797476, now seen corresponding path program 155 times [2021-03-10 21:46:13,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:13,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480897194] [2021-03-10 21:46:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:14,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480897194] [2021-03-10 21:46:14,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396921220] [2021-03-10 21:46:14,049 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 [2021-03-10 21:46:14,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:46:14,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:14,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:14,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:14,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:14,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:14,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:14,774 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 [2021-03-10 21:46:14,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:14,787 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 [2021-03-10 21:46:14,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:14,819 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-03-10 21:46:14,819 INFO L518 ElimStorePlain]: Eliminatee v_prenex_171 vanished before elimination [2021-03-10 21:46:14,819 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:46:14,819 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:14,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:14,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:46:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:14,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:14,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:46:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73006273] [2021-03-10 21:46:14,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:14,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:14,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:14,868 INFO L87 Difference]: Start difference. First operand 383 states and 1082 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) [2021-03-10 21:46:15,457 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 21:46:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:15,849 INFO L93 Difference]: Finished difference Result 422 states and 1159 transitions. [2021-03-10 21:46:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:46:15,850 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 [2021-03-10 21:46:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:15,851 INFO L225 Difference]: With dead ends: 422 [2021-03-10 21:46:15,851 INFO L226 Difference]: Without dead ends: 413 [2021-03-10 21:46:15,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1674.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:46:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-03-10 21:46:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 381. [2021-03-10 21:46:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.836842105263158) internal successors, (1078), 380 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1078 transitions. [2021-03-10 21:46:15,855 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1078 transitions. Word has length 16 [2021-03-10 21:46:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:15,855 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1078 transitions. [2021-03-10 21:46:15,855 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) [2021-03-10 21:46:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1078 transitions. [2021-03-10 21:46:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:15,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:15,855 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:16,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1301,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:16,056 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash -893316226, now seen corresponding path program 156 times [2021-03-10 21:46:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:16,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698772912] [2021-03-10 21:46:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:16,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698772912] [2021-03-10 21:46:16,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473181760] [2021-03-10 21:46:16,413 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 [2021-03-10 21:46:16,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:46:16,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:16,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:16,756 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:46:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:17,265 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 [2021-03-10 21:46:17,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:17,281 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 [2021-03-10 21:46:17,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:17,305 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-03-10 21:46:17,306 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:17,306 INFO L518 ElimStorePlain]: Eliminatee v_prenex_174 vanished before elimination [2021-03-10 21:46:17,306 INFO L518 ElimStorePlain]: Eliminatee v_prenex_175 vanished before elimination [2021-03-10 21:46:17,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:17,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:46:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:17,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:17,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 21:46:17,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271756223] [2021-03-10 21:46:17,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:17,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:17,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:17,321 INFO L87 Difference]: Start difference. First operand 381 states and 1078 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) [2021-03-10 21:46:17,701 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:46:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:17,914 INFO L93 Difference]: Finished difference Result 406 states and 1128 transitions. [2021-03-10 21:46:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:46:17,915 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 [2021-03-10 21:46:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:17,916 INFO L225 Difference]: With dead ends: 406 [2021-03-10 21:46:17,916 INFO L226 Difference]: Without dead ends: 398 [2021-03-10 21:46:17,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1164.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:46:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-03-10 21:46:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 382. [2021-03-10 21:46:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8346456692913384) internal successors, (1080), 381 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1080 transitions. [2021-03-10 21:46:17,920 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1080 transitions. Word has length 16 [2021-03-10 21:46:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:17,920 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1080 transitions. [2021-03-10 21:46:17,920 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) [2021-03-10 21:46:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1080 transitions. [2021-03-10 21:46:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:17,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:17,920 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:18,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1317 [2021-03-10 21:46:18,122 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:18,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:18,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1062263106, now seen corresponding path program 157 times [2021-03-10 21:46:18,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:18,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034606309] [2021-03-10 21:46:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:18,420 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 21:46:18,563 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 21:46:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:18,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034606309] [2021-03-10 21:46:18,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008176532] [2021-03-10 21:46:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:46:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:18,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:18,965 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:46:19,146 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:46:19,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:19,440 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 [2021-03-10 21:46:19,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:19,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:46:19,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:19,462 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 [2021-03-10 21:46:19,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:19,488 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-03-10 21:46:19,489 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:19,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:19,489 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:46:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:19,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:19,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:46:19,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644432782] [2021-03-10 21:46:19,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:19,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:19,548 INFO L87 Difference]: Start difference. First operand 382 states and 1080 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) [2021-03-10 21:46:19,959 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 21:46:20,259 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 21:46:20,751 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-10 21:46:20,893 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 21:46:21,279 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 21:46:21,442 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 21:46:21,816 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 21:46:22,003 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-10 21:46:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:22,034 INFO L93 Difference]: Finished difference Result 437 states and 1191 transitions. [2021-03-10 21:46:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:46:22,035 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 [2021-03-10 21:46:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:22,036 INFO L225 Difference]: With dead ends: 437 [2021-03-10 21:46:22,036 INFO L226 Difference]: Without dead ends: 426 [2021-03-10 21:46:22,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 3002.4ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:46:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-03-10 21:46:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 390. [2021-03-10 21:46:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.83547557840617) internal successors, (1103), 389 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1103 transitions. [2021-03-10 21:46:22,040 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1103 transitions. Word has length 16 [2021-03-10 21:46:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:22,040 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1103 transitions. [2021-03-10 21:46:22,040 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) [2021-03-10 21:46:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1103 transitions. [2021-03-10 21:46:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:22,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:22,041 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:22,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1334,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:22,241 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash -450417086, now seen corresponding path program 158 times [2021-03-10 21:46:22,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:22,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24417186] [2021-03-10 21:46:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:22,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24417186] [2021-03-10 21:46:22,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138027632] [2021-03-10 21:46:22,653 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 [2021-03-10 21:46:22,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:22,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:22,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:22,972 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:46:23,114 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:46:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:23,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:23,483 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 [2021-03-10 21:46:23,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,511 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-03-10 21:46:23,511 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:23,511 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-03-10 21:46:23,511 INFO L518 ElimStorePlain]: Eliminatee v_prenex_179 vanished before elimination [2021-03-10 21:46:23,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-03-10 21:46:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:23,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:23,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:46:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029882385] [2021-03-10 21:46:23,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:23,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:23,543 INFO L87 Difference]: Start difference. First operand 390 states and 1103 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) [2021-03-10 21:46:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:24,403 INFO L93 Difference]: Finished difference Result 469 states and 1250 transitions. [2021-03-10 21:46:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:46:24,405 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 [2021-03-10 21:46:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:24,406 INFO L225 Difference]: With dead ends: 469 [2021-03-10 21:46:24,406 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 21:46:24,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1342.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:46:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 21:46:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 395. [2021-03-10 21:46:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8401015228426396) internal successors, (1119), 394 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1119 transitions. [2021-03-10 21:46:24,410 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1119 transitions. Word has length 16 [2021-03-10 21:46:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:24,410 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 1119 transitions. [2021-03-10 21:46:24,410 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) [2021-03-10 21:46:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1119 transitions. [2021-03-10 21:46:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:24,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:24,411 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:24,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-03-10 21:46:24,611 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:24,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:24,611 INFO L82 PathProgramCache]: Analyzing trace with hash -231780956, now seen corresponding path program 159 times [2021-03-10 21:46:24,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:24,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780271139] [2021-03-10 21:46:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:25,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780271139] [2021-03-10 21:46:25,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988987595] [2021-03-10 21:46:25,279 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 [2021-03-10 21:46:25,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:46:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:25,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:25,667 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:46:25,885 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 21:46:26,086 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 21:46:26,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:26,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:26,263 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 [2021-03-10 21:46:26,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,276 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 [2021-03-10 21:46:26,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,362 INFO L628 ElimStorePlain]: treesize reduction 76, result has 46.9 percent of original size [2021-03-10 21:46:26,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_182 vanished before elimination [2021-03-10 21:46:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:46:26,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:26,371 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 [2021-03-10 21:46:26,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:26,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:26,399 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 [2021-03-10 21:46:26,402 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:26,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:26,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:26,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:197, output treesize:22 [2021-03-10 21:46:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:26,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:26,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 21:46:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645239177] [2021-03-10 21:46:26,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:46:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:46:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:46:26,496 INFO L87 Difference]: Start difference. First operand 395 states and 1119 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) [2021-03-10 21:46:26,782 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 21:46:27,059 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 21:46:27,253 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 21:46:27,530 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:46:27,770 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 21:46:28,028 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 21:46:28,305 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-03-10 21:46:28,558 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-10 21:46:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:28,820 INFO L93 Difference]: Finished difference Result 482 states and 1297 transitions. [2021-03-10 21:46:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:46:28,821 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 [2021-03-10 21:46:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:28,822 INFO L225 Difference]: With dead ends: 482 [2021-03-10 21:46:28,822 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 21:46:28,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2896.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:46:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 21:46:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 400. [2021-03-10 21:46:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.8471177944862154) internal successors, (1136), 399 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1136 transitions. [2021-03-10 21:46:28,826 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1136 transitions. Word has length 16 [2021-03-10 21:46:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:28,826 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1136 transitions. [2021-03-10 21:46:28,826 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) [2021-03-10 21:46:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1136 transitions. [2021-03-10 21:46:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:28,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:28,827 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:29,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1372 [2021-03-10 21:46:29,027 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:29,028 INFO L82 PathProgramCache]: Analyzing trace with hash 574124002, now seen corresponding path program 160 times [2021-03-10 21:46:29,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:29,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353210780] [2021-03-10 21:46:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:29,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353210780] [2021-03-10 21:46:29,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759914823] [2021-03-10 21:46:29,212 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 [2021-03-10 21:46:29,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:29,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:46:29,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:29,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:29,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:29,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:29,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:29,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,422 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 17 treesize of output 13 [2021-03-10 21:46:29,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:29,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:29,429 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 [2021-03-10 21:46:29,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:29,503 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:46:29,503 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:29,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:29,504 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:46:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:29,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:29,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:46:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264423900] [2021-03-10 21:46:29,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:29,639 INFO L87 Difference]: Start difference. First operand 400 states and 1136 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) [2021-03-10 21:46:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:30,099 INFO L93 Difference]: Finished difference Result 456 states and 1225 transitions. [2021-03-10 21:46:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:46:30,101 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 [2021-03-10 21:46:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:30,102 INFO L225 Difference]: With dead ends: 456 [2021-03-10 21:46:30,102 INFO L226 Difference]: Without dead ends: 454 [2021-03-10 21:46:30,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:46:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-10 21:46:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 390. [2021-03-10 21:46:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.832904884318766) internal successors, (1102), 389 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1102 transitions. [2021-03-10 21:46:30,106 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1102 transitions. Word has length 16 [2021-03-10 21:46:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:30,106 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1102 transitions. [2021-03-10 21:46:30,106 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) [2021-03-10 21:46:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1102 transitions. [2021-03-10 21:46:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:30,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:30,106 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:30,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:30,307 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash -224050558, now seen corresponding path program 161 times [2021-03-10 21:46:30,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:30,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653565226] [2021-03-10 21:46:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:30,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653565226] [2021-03-10 21:46:30,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230142966] [2021-03-10 21:46:30,658 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 [2021-03-10 21:46:30,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:46:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:30,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:30,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:31,046 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 21:46:31,264 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 21:46:31,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:31,498 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 [2021-03-10 21:46:31,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:31,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:31,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 21:46:31,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:31,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:31,523 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 [2021-03-10 21:46:31,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:31,552 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-03-10 21:46:31,552 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:31,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:31,554 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:46:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:31,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:31,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:46:31,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742417625] [2021-03-10 21:46:31,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:31,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:31,601 INFO L87 Difference]: Start difference. First operand 390 states and 1102 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) [2021-03-10 21:46:32,142 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 21:46:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:32,319 INFO L93 Difference]: Finished difference Result 444 states and 1208 transitions. [2021-03-10 21:46:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:46:32,321 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 [2021-03-10 21:46:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:32,321 INFO L225 Difference]: With dead ends: 444 [2021-03-10 21:46:32,321 INFO L226 Difference]: Without dead ends: 440 [2021-03-10 21:46:32,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1303.7ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:46:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-03-10 21:46:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 404. [2021-03-10 21:46:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.8436724565756824) internal successors, (1146), 403 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1146 transitions. [2021-03-10 21:46:32,325 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1146 transitions. Word has length 16 [2021-03-10 21:46:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:32,326 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 1146 transitions. [2021-03-10 21:46:32,326 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) [2021-03-10 21:46:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1146 transitions. [2021-03-10 21:46:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:32,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:32,326 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:32,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-03-10 21:46:32,527 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1713455554, now seen corresponding path program 162 times [2021-03-10 21:46:32,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:32,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055540953] [2021-03-10 21:46:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055540953] [2021-03-10 21:46:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242803789] [2021-03-10 21:46:33,186 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 [2021-03-10 21:46:33,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:46:33,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:33,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:33,585 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 21:46:33,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:46:33,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,940 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 [2021-03-10 21:46:33,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,949 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 [2021-03-10 21:46:33,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,979 INFO L628 ElimStorePlain]: treesize reduction 68, result has 13.9 percent of original size [2021-03-10 21:46:33,979 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:33,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:46:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:34,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:34,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:46:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436624968] [2021-03-10 21:46:34,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:34,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:34,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:34,040 INFO L87 Difference]: Start difference. First operand 404 states and 1146 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) [2021-03-10 21:46:34,351 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 21:46:34,653 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 21:46:34,886 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 21:46:35,148 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-10 21:46:35,315 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 21:46:35,667 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:46:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:35,714 INFO L93 Difference]: Finished difference Result 436 states and 1210 transitions. [2021-03-10 21:46:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:46:35,715 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 [2021-03-10 21:46:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:35,716 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:46:35,716 INFO L226 Difference]: Without dead ends: 432 [2021-03-10 21:46:35,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2413.2ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:46:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-03-10 21:46:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 407. [2021-03-10 21:46:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.8448275862068964) internal successors, (1155), 406 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1155 transitions. [2021-03-10 21:46:35,720 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1155 transitions. Word has length 16 [2021-03-10 21:46:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:35,720 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 1155 transitions. [2021-03-10 21:46:35,720 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) [2021-03-10 21:46:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1155 transitions. [2021-03-10 21:46:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:46:35,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:35,721 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:35,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:35,921 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -640370174, now seen corresponding path program 163 times [2021-03-10 21:46:35,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:35,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758650056] [2021-03-10 21:46:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:36,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758650056] [2021-03-10 21:46:36,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518749568] [2021-03-10 21:46:36,511 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 [2021-03-10 21:46:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:36,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:46:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:36,989 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 21:46:37,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 21:46:37,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:37,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:37,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:37,270 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 [2021-03-10 21:46:37,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:37,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:37,279 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 [2021-03-10 21:46:37,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:37,312 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-03-10 21:46:37,312 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:37,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:37,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-03-10 21:46:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:37,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:37,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-10 21:46:37,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644119908] [2021-03-10 21:46:37,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:37,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:37,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:37,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:37,336 INFO L87 Difference]: Start difference. First operand 407 states and 1155 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) [2021-03-10 21:46:37,721 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 21:46:37,952 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 21:46:38,142 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:46:38,318 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:46:38,478 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 21:46:38,663 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 21:46:38,919 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 21:46:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:39,110 INFO L93 Difference]: Finished difference Result 444 states and 1225 transitions. [2021-03-10 21:46:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:46:39,112 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 [2021-03-10 21:46:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:39,112 INFO L225 Difference]: With dead ends: 444 [2021-03-10 21:46:39,112 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 21:46:39,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2285.4ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:46:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 21:46:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 407. [2021-03-10 21:46:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.8448275862068964) internal successors, (1155), 406 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1155 transitions. [2021-03-10 21:46:39,116 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1155 transitions. Word has length 16 [2021-03-10 21:46:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:39,117 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 1155 transitions. [2021-03-10 21:46:39,117 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) [2021-03-10 21:46:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1155 transitions. [2021-03-10 21:46:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:39,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:39,117 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:39,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:39,318 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2002561658, now seen corresponding path program 164 times [2021-03-10 21:46:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:39,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854900209] [2021-03-10 21:46:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:39,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854900209] [2021-03-10 21:46:39,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261379439] [2021-03-10 21:46:39,484 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 [2021-03-10 21:46:39,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:39,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:39,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:39,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:39,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:39,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:39,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:39,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:39,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:46:39,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:39,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:39,763 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 [2021-03-10 21:46:39,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:39,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:46:39,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:39,812 INFO L628 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2021-03-10 21:46:39,812 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:39,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:46:39,813 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-03-10 21:46:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:39,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:39,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:46:39,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792097176] [2021-03-10 21:46:39,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:39,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:39,854 INFO L87 Difference]: Start difference. First operand 407 states and 1155 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) [2021-03-10 21:46:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:40,636 INFO L93 Difference]: Finished difference Result 541 states and 1484 transitions. [2021-03-10 21:46:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:46:40,638 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 [2021-03-10 21:46:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:40,639 INFO L225 Difference]: With dead ends: 541 [2021-03-10 21:46:40,639 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 21:46:40,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 864.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:46:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 21:46:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 404. [2021-03-10 21:46:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.8511166253101736) internal successors, (1149), 403 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1149 transitions. [2021-03-10 21:46:40,643 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1149 transitions. Word has length 17 [2021-03-10 21:46:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:40,643 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 1149 transitions. [2021-03-10 21:46:40,643 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) [2021-03-10 21:46:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1149 transitions. [2021-03-10 21:46:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:40,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:40,644 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:40,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-03-10 21:46:40,844 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash 464142156, now seen corresponding path program 165 times [2021-03-10 21:46:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:40,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925754225] [2021-03-10 21:46:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:41,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925754225] [2021-03-10 21:46:41,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887691030] [2021-03-10 21:46:41,016 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 [2021-03-10 21:46:41,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:46:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:41,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:41,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:41,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:41,253 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 [2021-03-10 21:46:41,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:41,289 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-03-10 21:46:41,289 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:41,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:41,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-03-10 21:46:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:41,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:41,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:46:41,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872458609] [2021-03-10 21:46:41,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:41,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:41,338 INFO L87 Difference]: Start difference. First operand 404 states and 1149 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) [2021-03-10 21:46:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:41,715 INFO L93 Difference]: Finished difference Result 542 states and 1492 transitions. [2021-03-10 21:46:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:41,717 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 [2021-03-10 21:46:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:41,717 INFO L225 Difference]: With dead ends: 542 [2021-03-10 21:46:41,717 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 21:46:41,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 21:46:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 405. [2021-03-10 21:46:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.8514851485148514) internal successors, (1152), 404 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1152 transitions. [2021-03-10 21:46:41,722 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1152 transitions. Word has length 17 [2021-03-10 21:46:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:41,722 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1152 transitions. [2021-03-10 21:46:41,722 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) [2021-03-10 21:46:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1152 transitions. [2021-03-10 21:46:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:41,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:41,722 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:41,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-03-10 21:46:41,923 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2101260346, now seen corresponding path program 166 times [2021-03-10 21:46:41,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:41,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426233457] [2021-03-10 21:46:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426233457] [2021-03-10 21:46:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963627885] [2021-03-10 21:46:42,177 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 [2021-03-10 21:46:42,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:42,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:42,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,451 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 [2021-03-10 21:46:42,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:42,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,459 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 [2021-03-10 21:46:42,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:42,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:42,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:42,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:42,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:42,543 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:46:42,543 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:42,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:42,545 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:46:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:42,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:42,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:42,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930076493] [2021-03-10 21:46:42,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:42,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:42,660 INFO L87 Difference]: Start difference. First operand 405 states and 1152 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) [2021-03-10 21:46:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:43,570 INFO L93 Difference]: Finished difference Result 591 states and 1575 transitions. [2021-03-10 21:46:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:46:43,572 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 [2021-03-10 21:46:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:43,573 INFO L225 Difference]: With dead ends: 591 [2021-03-10 21:46:43,573 INFO L226 Difference]: Without dead ends: 591 [2021-03-10 21:46:43,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:46:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-03-10 21:46:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 412. [2021-03-10 21:46:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8588807785888077) internal successors, (1175), 411 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1175 transitions. [2021-03-10 21:46:43,578 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1175 transitions. Word has length 17 [2021-03-10 21:46:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:43,578 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1175 transitions. [2021-03-10 21:46:43,578 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) [2021-03-10 21:46:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1175 transitions. [2021-03-10 21:46:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:43,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:43,578 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:43,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1467 [2021-03-10 21:46:43,779 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1392090722, now seen corresponding path program 167 times [2021-03-10 21:46:43,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:43,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141825367] [2021-03-10 21:46:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:43,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141825367] [2021-03-10 21:46:43,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447418200] [2021-03-10 21:46:43,992 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 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 [2021-03-10 21:46:44,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:46:44,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:44,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,251 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 [2021-03-10 21:46:44,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:44,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,266 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 16 treesize of output 12 [2021-03-10 21:46:44,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:44,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,348 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:46:44,348 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:44,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:44,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:46:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:44,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:44,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:44,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194221268] [2021-03-10 21:46:44,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:44,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:44,507 INFO L87 Difference]: Start difference. First operand 412 states and 1175 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) [2021-03-10 21:46:45,027 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:46:45,181 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 21:46:45,994 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:46:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:46,721 INFO L93 Difference]: Finished difference Result 624 states and 1633 transitions. [2021-03-10 21:46:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:46:46,723 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 [2021-03-10 21:46:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:46,723 INFO L225 Difference]: With dead ends: 624 [2021-03-10 21:46:46,723 INFO L226 Difference]: Without dead ends: 615 [2021-03-10 21:46:46,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2020.0ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:46:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-03-10 21:46:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 421. [2021-03-10 21:46:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.869047619047619) internal successors, (1205), 420 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1205 transitions. [2021-03-10 21:46:46,728 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1205 transitions. Word has length 17 [2021-03-10 21:46:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:46,728 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1205 transitions. [2021-03-10 21:46:46,728 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) [2021-03-10 21:46:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1205 transitions. [2021-03-10 21:46:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:46,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:46,729 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:46,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:46,929 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:46,930 INFO L82 PathProgramCache]: Analyzing trace with hash 326252984, now seen corresponding path program 168 times [2021-03-10 21:46:46,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:46,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707149099] [2021-03-10 21:46:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:47,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707149099] [2021-03-10 21:46:47,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696637139] [2021-03-10 21:46:47,106 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 [2021-03-10 21:46:47,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:46:47,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:47,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:47,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:47,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:47,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:47,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:47,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:47,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:47,332 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 17 treesize of output 13 [2021-03-10 21:46:47,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:47,412 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:46:47,412 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:47,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:47,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:46:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:47,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:47,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:47,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464782660] [2021-03-10 21:46:47,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:47,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:47,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:47,536 INFO L87 Difference]: Start difference. First operand 421 states and 1205 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) [2021-03-10 21:46:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:48,923 INFO L93 Difference]: Finished difference Result 603 states and 1606 transitions. [2021-03-10 21:46:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:46:48,924 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 [2021-03-10 21:46:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:48,925 INFO L225 Difference]: With dead ends: 603 [2021-03-10 21:46:48,925 INFO L226 Difference]: Without dead ends: 603 [2021-03-10 21:46:48,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1140.3ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:46:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-03-10 21:46:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 419. [2021-03-10 21:46:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.8588516746411483) internal successors, (1195), 418 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1195 transitions. [2021-03-10 21:46:48,930 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1195 transitions. Word has length 17 [2021-03-10 21:46:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:48,930 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 1195 transitions. [2021-03-10 21:46:48,930 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) [2021-03-10 21:46:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1195 transitions. [2021-03-10 21:46:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:48,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:48,931 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:49,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1476 [2021-03-10 21:46:49,131 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1384360324, now seen corresponding path program 169 times [2021-03-10 21:46:49,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:49,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134793733] [2021-03-10 21:46:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:49,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134793733] [2021-03-10 21:46:49,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310429066] [2021-03-10 21:46:49,344 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 [2021-03-10 21:46:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:49,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:49,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:49,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:49,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:49,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,728 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:46:49,728 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:49,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:46:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:49,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:49,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:49,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651029679] [2021-03-10 21:46:49,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:49,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:49,781 INFO L87 Difference]: Start difference. First operand 419 states and 1195 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) [2021-03-10 21:46:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:50,958 INFO L93 Difference]: Finished difference Result 657 states and 1718 transitions. [2021-03-10 21:46:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:46:50,959 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 [2021-03-10 21:46:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:50,960 INFO L225 Difference]: With dead ends: 657 [2021-03-10 21:46:50,960 INFO L226 Difference]: Without dead ends: 657 [2021-03-10 21:46:50,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:46:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-03-10 21:46:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 431. [2021-03-10 21:46:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.874418604651163) internal successors, (1236), 430 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1236 transitions. [2021-03-10 21:46:50,965 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1236 transitions. Word has length 17 [2021-03-10 21:46:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:50,965 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1236 transitions. [2021-03-10 21:46:50,965 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) [2021-03-10 21:46:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1236 transitions. [2021-03-10 21:46:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:50,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:50,965 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:51,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:51,166 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:51,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1421201976, now seen corresponding path program 170 times [2021-03-10 21:46:51,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:51,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913576091] [2021-03-10 21:46:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:51,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913576091] [2021-03-10 21:46:51,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588890489] [2021-03-10 21:46:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:46:51,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:51,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:51,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:51,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:51,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:51,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:51,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:51,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:51,722 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 [2021-03-10 21:46:51,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:51,768 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:46:51,768 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:51,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:51,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:46:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:51,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:51,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:51,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978897301] [2021-03-10 21:46:51,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:51,825 INFO L87 Difference]: Start difference. First operand 431 states and 1236 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) [2021-03-10 21:46:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:52,899 INFO L93 Difference]: Finished difference Result 614 states and 1671 transitions. [2021-03-10 21:46:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:46:52,899 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 [2021-03-10 21:46:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:52,900 INFO L225 Difference]: With dead ends: 614 [2021-03-10 21:46:52,900 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 21:46:52,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1044.8ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:46:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 21:46:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-03-10 21:46:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8723897911832945) internal successors, (1238), 431 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1238 transitions. [2021-03-10 21:46:52,904 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1238 transitions. Word has length 17 [2021-03-10 21:46:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:52,904 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1238 transitions. [2021-03-10 21:46:52,905 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) [2021-03-10 21:46:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1238 transitions. [2021-03-10 21:46:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:52,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:52,905 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:53,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:53,106 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1800679940, now seen corresponding path program 171 times [2021-03-10 21:46:53,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:53,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840125105] [2021-03-10 21:46:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:53,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840125105] [2021-03-10 21:46:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599666060] [2021-03-10 21:46:53,289 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 [2021-03-10 21:46:53,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:46:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:53,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:53,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:53,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:53,664 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:46:53,664 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:53,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:53,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:46:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:53,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:53,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:53,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063259355] [2021-03-10 21:46:53,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:53,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:53,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:53,718 INFO L87 Difference]: Start difference. First operand 432 states and 1238 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) [2021-03-10 21:46:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:54,158 INFO L93 Difference]: Finished difference Result 570 states and 1581 transitions. [2021-03-10 21:46:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:54,159 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 [2021-03-10 21:46:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:54,160 INFO L225 Difference]: With dead ends: 570 [2021-03-10 21:46:54,160 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 21:46:54,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 21:46:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 432. [2021-03-10 21:46:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8723897911832945) internal successors, (1238), 431 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1238 transitions. [2021-03-10 21:46:54,165 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1238 transitions. Word has length 17 [2021-03-10 21:46:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:54,165 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1238 transitions. [2021-03-10 21:46:54,165 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) [2021-03-10 21:46:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1238 transitions. [2021-03-10 21:46:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:54,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:54,166 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:54,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-03-10 21:46:54,381 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1235007934, now seen corresponding path program 172 times [2021-03-10 21:46:54,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:54,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967110684] [2021-03-10 21:46:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:54,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967110684] [2021-03-10 21:46:54,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212869910] [2021-03-10 21:46:54,580 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 [2021-03-10 21:46:54,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:54,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:54,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:54,873 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 15 treesize of output 11 [2021-03-10 21:46:54,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:54,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:54,881 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 16 treesize of output 12 [2021-03-10 21:46:54,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:54,928 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:46:54,929 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:54,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:46:54,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:46:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:54,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:54,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516125141] [2021-03-10 21:46:54,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:54,985 INFO L87 Difference]: Start difference. First operand 432 states and 1238 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) [2021-03-10 21:46:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:55,883 INFO L93 Difference]: Finished difference Result 626 states and 1661 transitions. [2021-03-10 21:46:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:46:55,884 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 [2021-03-10 21:46:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:55,885 INFO L225 Difference]: With dead ends: 626 [2021-03-10 21:46:55,885 INFO L226 Difference]: Without dead ends: 626 [2021-03-10 21:46:55,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:46:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-03-10 21:46:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 476. [2021-03-10 21:46:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.917894736842105) internal successors, (1386), 475 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1386 transitions. [2021-03-10 21:46:55,891 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1386 transitions. Word has length 17 [2021-03-10 21:46:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:55,891 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1386 transitions. [2021-03-10 21:46:55,891 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) [2021-03-10 21:46:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1386 transitions. [2021-03-10 21:46:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:55,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:55,891 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:56,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-03-10 21:46:56,092 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash 315307226, now seen corresponding path program 173 times [2021-03-10 21:46:56,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:56,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577104083] [2021-03-10 21:46:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:56,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577104083] [2021-03-10 21:46:56,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287751039] [2021-03-10 21:46:56,258 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 [2021-03-10 21:46:56,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:46:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:56,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:56,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:46:56,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:56,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,530 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 [2021-03-10 21:46:56,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:46:56,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:46:56,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,609 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:46:56,609 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:56,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:46:56,611 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:46:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:56,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:56,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:56,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869685149] [2021-03-10 21:46:56,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:56,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:56,691 INFO L87 Difference]: Start difference. First operand 476 states and 1386 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) [2021-03-10 21:46:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:57,925 INFO L93 Difference]: Finished difference Result 570 states and 1541 transitions. [2021-03-10 21:46:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:46:57,926 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 [2021-03-10 21:46:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:57,927 INFO L225 Difference]: With dead ends: 570 [2021-03-10 21:46:57,927 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:46:57,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 915.7ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:46:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:46:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 477. [2021-03-10 21:46:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.9012605042016806) internal successors, (1381), 476 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1381 transitions. [2021-03-10 21:46:57,932 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1381 transitions. Word has length 17 [2021-03-10 21:46:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:57,932 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1381 transitions. [2021-03-10 21:46:57,932 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) [2021-03-10 21:46:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1381 transitions. [2021-03-10 21:46:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:57,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:57,933 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:58,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:58,133 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1242738332, now seen corresponding path program 174 times [2021-03-10 21:46:58,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:58,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503229062] [2021-03-10 21:46:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503229062] [2021-03-10 21:46:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365186737] [2021-03-10 21:46:58,343 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 [2021-03-10 21:46:58,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:46:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:58,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:46:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,592 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 [2021-03-10 21:46:58,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:58,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:58,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:58,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,610 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 [2021-03-10 21:46:58,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:58,616 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 [2021-03-10 21:46:58,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:58,665 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:46:58,665 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:58,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:46:58,666 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:46:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:58,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:58,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:46:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162610157] [2021-03-10 21:46:58,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:58,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:58,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:58,739 INFO L87 Difference]: Start difference. First operand 477 states and 1381 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) [2021-03-10 21:46:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:59,834 INFO L93 Difference]: Finished difference Result 637 states and 1671 transitions. [2021-03-10 21:46:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:46:59,836 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 [2021-03-10 21:46:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:59,837 INFO L225 Difference]: With dead ends: 637 [2021-03-10 21:46:59,837 INFO L226 Difference]: Without dead ends: 636 [2021-03-10 21:46:59,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 867.8ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:46:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-03-10 21:46:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 482. [2021-03-10 21:46:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.912681912681913) internal successors, (1401), 481 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1401 transitions. [2021-03-10 21:46:59,842 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1401 transitions. Word has length 17 [2021-03-10 21:46:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:59,842 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1401 transitions. [2021-03-10 21:46:59,842 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) [2021-03-10 21:46:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1401 transitions. [2021-03-10 21:46:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:59,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:59,843 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:00,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-03-10 21:47:00,043 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:00,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354560, now seen corresponding path program 175 times [2021-03-10 21:47:00,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:00,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381096351] [2021-03-10 21:47:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:00,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381096351] [2021-03-10 21:47:00,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519524657] [2021-03-10 21:47:00,237 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 [2021-03-10 21:47:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:00,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:00,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:00,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,465 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 [2021-03-10 21:47:00,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:00,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,483 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 [2021-03-10 21:47:00,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,560 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:00,561 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:00,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:00,562 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:00,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:00,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639204553] [2021-03-10 21:47:00,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:00,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:00,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:00,741 INFO L87 Difference]: Start difference. First operand 482 states and 1401 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) [2021-03-10 21:47:01,950 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:47:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:02,511 INFO L93 Difference]: Finished difference Result 644 states and 1695 transitions. [2021-03-10 21:47:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:47:02,513 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 [2021-03-10 21:47:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:02,514 INFO L225 Difference]: With dead ends: 644 [2021-03-10 21:47:02,514 INFO L226 Difference]: Without dead ends: 640 [2021-03-10 21:47:02,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1536.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:47:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-03-10 21:47:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 494. [2021-03-10 21:47:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.9148073022312375) internal successors, (1437), 493 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) [2021-03-10 21:47:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1437 transitions. [2021-03-10 21:47:02,520 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1437 transitions. Word has length 17 [2021-03-10 21:47:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:02,520 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1437 transitions. [2021-03-10 21:47:02,520 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) [2021-03-10 21:47:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1437 transitions. [2021-03-10 21:47:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:02,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:02,520 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:02,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1500,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:02,721 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash -532269030, now seen corresponding path program 176 times [2021-03-10 21:47:02,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:02,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961130360] [2021-03-10 21:47:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961130360] [2021-03-10 21:47:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168101063] [2021-03-10 21:47:02,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:47:02,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:02,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,057 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 [2021-03-10 21:47:03,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:03,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:03,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:03,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,075 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 [2021-03-10 21:47:03,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:03,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:03,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:03,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:03,168 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:03,168 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:03,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:03,170 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:03,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:03,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:03,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024723183] [2021-03-10 21:47:03,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:03,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:03,302 INFO L87 Difference]: Start difference. First operand 494 states and 1437 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) [2021-03-10 21:47:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:04,791 INFO L93 Difference]: Finished difference Result 630 states and 1666 transitions. [2021-03-10 21:47:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:47:04,793 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 [2021-03-10 21:47:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:04,794 INFO L225 Difference]: With dead ends: 630 [2021-03-10 21:47:04,794 INFO L226 Difference]: Without dead ends: 630 [2021-03-10 21:47:04,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1114.7ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:47:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-03-10 21:47:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 476. [2021-03-10 21:47:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.8905263157894736) internal successors, (1373), 475 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1373 transitions. [2021-03-10 21:47:04,799 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1373 transitions. Word has length 17 [2021-03-10 21:47:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:04,799 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1373 transitions. [2021-03-10 21:47:04,799 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) [2021-03-10 21:47:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1373 transitions. [2021-03-10 21:47:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:04,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:04,800 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:05,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1505,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:05,000 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1360854522, now seen corresponding path program 177 times [2021-03-10 21:47:05,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:05,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133766223] [2021-03-10 21:47:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133766223] [2021-03-10 21:47:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826602368] [2021-03-10 21:47:05,228 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 [2021-03-10 21:47:05,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:47:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:05,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,447 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 16 treesize of output 12 [2021-03-10 21:47:05,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,455 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 15 treesize of output 11 [2021-03-10 21:47:05,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:05,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,470 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 17 treesize of output 13 [2021-03-10 21:47:05,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,551 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:05,551 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:05,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:05,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:05,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:05,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:05,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042859285] [2021-03-10 21:47:05,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:05,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:05,708 INFO L87 Difference]: Start difference. First operand 476 states and 1373 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) [2021-03-10 21:47:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:08,139 INFO L93 Difference]: Finished difference Result 661 states and 1719 transitions. [2021-03-10 21:47:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:47:08,140 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 [2021-03-10 21:47:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:08,141 INFO L225 Difference]: With dead ends: 661 [2021-03-10 21:47:08,141 INFO L226 Difference]: Without dead ends: 656 [2021-03-10 21:47:08,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1840.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:47:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-03-10 21:47:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 496. [2021-03-10 21:47:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.898989898989899) internal successors, (1435), 495 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1435 transitions. [2021-03-10 21:47:08,147 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1435 transitions. Word has length 17 [2021-03-10 21:47:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:08,147 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 1435 transitions. [2021-03-10 21:47:08,147 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) [2021-03-10 21:47:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1435 transitions. [2021-03-10 21:47:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:08,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:08,147 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:08,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1509,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:08,351 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:08,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1205065440, now seen corresponding path program 178 times [2021-03-10 21:47:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:08,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369407715] [2021-03-10 21:47:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:08,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369407715] [2021-03-10 21:47:08,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784644304] [2021-03-10 21:47:08,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:08,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:47:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:08,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:08,890 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 [2021-03-10 21:47:08,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:08,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:08,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:08,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:08,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:47:08,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:08,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:08,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:08,924 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 [2021-03-10 21:47:08,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:08,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:47:08,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:09,000 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:47:09,000 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:09,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:47:09,003 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:47:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:09,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:09,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960503532] [2021-03-10 21:47:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:09,082 INFO L87 Difference]: Start difference. First operand 496 states and 1435 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) [2021-03-10 21:47:09,862 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:47:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:10,591 INFO L93 Difference]: Finished difference Result 595 states and 1601 transitions. [2021-03-10 21:47:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:47:10,593 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 [2021-03-10 21:47:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:10,594 INFO L225 Difference]: With dead ends: 595 [2021-03-10 21:47:10,594 INFO L226 Difference]: Without dead ends: 587 [2021-03-10 21:47:10,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:47:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-03-10 21:47:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 500. [2021-03-10 21:47:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.875751503006012) internal successors, (1435), 499 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1435 transitions. [2021-03-10 21:47:10,600 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1435 transitions. Word has length 17 [2021-03-10 21:47:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:10,600 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 1435 transitions. [2021-03-10 21:47:10,600 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) [2021-03-10 21:47:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1435 transitions. [2021-03-10 21:47:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:10,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:10,600 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:10,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1515 [2021-03-10 21:47:10,815 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:10,815 INFO L82 PathProgramCache]: Analyzing trace with hash 562679962, now seen corresponding path program 179 times [2021-03-10 21:47:10,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:10,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253392810] [2021-03-10 21:47:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:11,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253392810] [2021-03-10 21:47:11,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822801344] [2021-03-10 21:47:11,038 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) [2021-03-10 21:47:11,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:47:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:11,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,369 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 15 treesize of output 11 [2021-03-10 21:47:11,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:11,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,436 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:47:11,436 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:11,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:47:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:11,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:11,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:11,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525449065] [2021-03-10 21:47:11,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:11,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:11,495 INFO L87 Difference]: Start difference. First operand 500 states and 1435 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) [2021-03-10 21:47:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:12,552 INFO L93 Difference]: Finished difference Result 703 states and 1806 transitions. [2021-03-10 21:47:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:47:12,554 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 [2021-03-10 21:47:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:12,555 INFO L225 Difference]: With dead ends: 703 [2021-03-10 21:47:12,555 INFO L226 Difference]: Without dead ends: 703 [2021-03-10 21:47:12,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:47:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-03-10 21:47:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 497. [2021-03-10 21:47:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.877016129032258) internal successors, (1427), 496 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1427 transitions. [2021-03-10 21:47:12,560 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1427 transitions. Word has length 17 [2021-03-10 21:47:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:12,561 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1427 transitions. [2021-03-10 21:47:12,561 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) [2021-03-10 21:47:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1427 transitions. [2021-03-10 21:47:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:12,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:12,561 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:12,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1522 [2021-03-10 21:47:12,763 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1861027394, now seen corresponding path program 180 times [2021-03-10 21:47:12,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:12,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960953461] [2021-03-10 21:47:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960953461] [2021-03-10 21:47:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696757783] [2021-03-10 21:47:12,986 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 [2021-03-10 21:47:13,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:47:13,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:13,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,237 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 [2021-03-10 21:47:13,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:13,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:13,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:13,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:13,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:13,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:13,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:13,348 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:13,348 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:13,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:13,350 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:13,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:13,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:13,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129878311] [2021-03-10 21:47:13,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:13,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:13,519 INFO L87 Difference]: Start difference. First operand 497 states and 1427 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) [2021-03-10 21:47:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:14,741 INFO L93 Difference]: Finished difference Result 617 states and 1655 transitions. [2021-03-10 21:47:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:47:14,742 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 [2021-03-10 21:47:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:14,743 INFO L225 Difference]: With dead ends: 617 [2021-03-10 21:47:14,743 INFO L226 Difference]: Without dead ends: 613 [2021-03-10 21:47:14,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1013.3ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:47:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-03-10 21:47:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 504. [2021-03-10 21:47:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.8767395626242545) internal successors, (1447), 503 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1447 transitions. [2021-03-10 21:47:14,748 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1447 transitions. Word has length 17 [2021-03-10 21:47:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:14,748 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 1447 transitions. [2021-03-10 21:47:14,748 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) [2021-03-10 21:47:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1447 transitions. [2021-03-10 21:47:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:14,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:14,749 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:14,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-03-10 21:47:14,950 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash -131980060, now seen corresponding path program 181 times [2021-03-10 21:47:14,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:14,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596755983] [2021-03-10 21:47:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:15,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596755983] [2021-03-10 21:47:15,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962417014] [2021-03-10 21:47:15,154 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 [2021-03-10 21:47:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:15,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:15,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,503 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 [2021-03-10 21:47:15,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:15,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:15,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:47:15,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:15,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:47:15,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,622 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:47:15,623 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:15,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:47:15,625 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:47:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:15,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:15,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:15,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390458120] [2021-03-10 21:47:15,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:15,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:15,691 INFO L87 Difference]: Start difference. First operand 504 states and 1447 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) [2021-03-10 21:47:16,331 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:47:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:16,498 INFO L93 Difference]: Finished difference Result 560 states and 1549 transitions. [2021-03-10 21:47:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:47:16,500 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 [2021-03-10 21:47:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:16,501 INFO L225 Difference]: With dead ends: 560 [2021-03-10 21:47:16,501 INFO L226 Difference]: Without dead ends: 552 [2021-03-10 21:47:16,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 810.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:47:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-03-10 21:47:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 504. [2021-03-10 21:47:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.8648111332007953) internal successors, (1441), 503 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) [2021-03-10 21:47:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1441 transitions. [2021-03-10 21:47:16,510 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1441 transitions. Word has length 17 [2021-03-10 21:47:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:16,510 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 1441 transitions. [2021-03-10 21:47:16,510 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) [2021-03-10 21:47:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1441 transitions. [2021-03-10 21:47:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:16,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:16,511 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:16,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-03-10 21:47:16,711 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1928879742, now seen corresponding path program 182 times [2021-03-10 21:47:16,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:16,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107534142] [2021-03-10 21:47:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:16,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107534142] [2021-03-10 21:47:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120231521] [2021-03-10 21:47:16,889 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 [2021-03-10 21:47:16,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:17,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:17,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:17,275 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 [2021-03-10 21:47:17,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:17,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:17,290 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 7 treesize of output 5 [2021-03-10 21:47:17,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:17,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:47:17,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:17,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:17,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:17,308 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 [2021-03-10 21:47:17,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:47:17,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:17,398 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:47:17,398 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:17,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:47:17,401 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:47:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:17,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:17,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:17,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159723015] [2021-03-10 21:47:17,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:17,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:17,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:17,478 INFO L87 Difference]: Start difference. First operand 504 states and 1441 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) [2021-03-10 21:47:17,939 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 21:47:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:18,257 INFO L93 Difference]: Finished difference Result 556 states and 1537 transitions. [2021-03-10 21:47:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:47:18,258 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 [2021-03-10 21:47:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:18,259 INFO L225 Difference]: With dead ends: 556 [2021-03-10 21:47:18,259 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 21:47:18,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 881.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:47:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 21:47:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2021-03-10 21:47:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.8475247524752474) internal successors, (1438), 505 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1438 transitions. [2021-03-10 21:47:18,264 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1438 transitions. Word has length 17 [2021-03-10 21:47:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:18,264 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1438 transitions. [2021-03-10 21:47:18,264 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) [2021-03-10 21:47:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1438 transitions. [2021-03-10 21:47:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:18,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:18,265 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:18,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:18,465 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash 146360346, now seen corresponding path program 183 times [2021-03-10 21:47:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:18,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486442699] [2021-03-10 21:47:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486442699] [2021-03-10 21:47:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774019677] [2021-03-10 21:47:18,580 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 [2021-03-10 21:47:18,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:47:18,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,825 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 [2021-03-10 21:47:18,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:18,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,887 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:47:18,888 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:18,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:47:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:18,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:18,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:18,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979623787] [2021-03-10 21:47:18,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:18,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:18,944 INFO L87 Difference]: Start difference. First operand 506 states and 1438 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) [2021-03-10 21:47:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:19,726 INFO L93 Difference]: Finished difference Result 594 states and 1619 transitions. [2021-03-10 21:47:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:47:19,728 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 [2021-03-10 21:47:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:19,729 INFO L225 Difference]: With dead ends: 594 [2021-03-10 21:47:19,729 INFO L226 Difference]: Without dead ends: 594 [2021-03-10 21:47:19,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:47:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-03-10 21:47:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 500. [2021-03-10 21:47:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.8537074148296595) internal successors, (1424), 499 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1424 transitions. [2021-03-10 21:47:19,734 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1424 transitions. Word has length 17 [2021-03-10 21:47:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:19,735 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 1424 transitions. [2021-03-10 21:47:19,735 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) [2021-03-10 21:47:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1424 transitions. [2021-03-10 21:47:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:19,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:19,735 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:19,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1545 [2021-03-10 21:47:19,936 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash -267672872, now seen corresponding path program 184 times [2021-03-10 21:47:19,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:19,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222518321] [2021-03-10 21:47:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222518321] [2021-03-10 21:47:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961357492] [2021-03-10 21:47:20,183 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 [2021-03-10 21:47:20,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:47:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:20,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:20,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:20,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:20,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:20,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:20,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:20,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:20,494 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 [2021-03-10 21:47:20,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:20,578 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:20,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:20,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:20,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:20,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:20,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:20,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778858163] [2021-03-10 21:47:20,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:20,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:20,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:20,712 INFO L87 Difference]: Start difference. First operand 500 states and 1424 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) [2021-03-10 21:47:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:21,401 INFO L93 Difference]: Finished difference Result 608 states and 1624 transitions. [2021-03-10 21:47:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:47:21,403 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 [2021-03-10 21:47:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:21,404 INFO L225 Difference]: With dead ends: 608 [2021-03-10 21:47:21,404 INFO L226 Difference]: Without dead ends: 608 [2021-03-10 21:47:21,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 642.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:47:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-03-10 21:47:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 510. [2021-03-10 21:47:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.864440078585462) internal successors, (1458), 509 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1458 transitions. [2021-03-10 21:47:21,409 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1458 transitions. Word has length 17 [2021-03-10 21:47:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:21,410 INFO L480 AbstractCegarLoop]: Abstraction has 510 states and 1458 transitions. [2021-03-10 21:47:21,410 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) [2021-03-10 21:47:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1458 transitions. [2021-03-10 21:47:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:21,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:21,410 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:21,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:21,611 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash 533943356, now seen corresponding path program 185 times [2021-03-10 21:47:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:21,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447287968] [2021-03-10 21:47:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:21,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447287968] [2021-03-10 21:47:21,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690062062] [2021-03-10 21:47:21,814 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 [2021-03-10 21:47:21,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:47:21,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:21,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:21,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:21,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:21,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:21,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:21,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:21,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:21,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,006 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 [2021-03-10 21:47:22,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:22,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,111 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:22,111 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:22,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:22,113 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:22,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:22,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:22,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47645061] [2021-03-10 21:47:22,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:22,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:22,297 INFO L87 Difference]: Start difference. First operand 510 states and 1458 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) [2021-03-10 21:47:22,943 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:47:23,177 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:47:23,368 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:47:23,626 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:47:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:24,515 INFO L93 Difference]: Finished difference Result 624 states and 1652 transitions. [2021-03-10 21:47:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:47:24,517 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 [2021-03-10 21:47:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:24,518 INFO L225 Difference]: With dead ends: 624 [2021-03-10 21:47:24,518 INFO L226 Difference]: Without dead ends: 615 [2021-03-10 21:47:24,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1792.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:47:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-03-10 21:47:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 515. [2021-03-10 21:47:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.8657587548638133) internal successors, (1473), 514 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1473 transitions. [2021-03-10 21:47:24,524 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1473 transitions. Word has length 17 [2021-03-10 21:47:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:24,524 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1473 transitions. [2021-03-10 21:47:24,524 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) [2021-03-10 21:47:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1473 transitions. [2021-03-10 21:47:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:24,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:24,525 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:24,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-03-10 21:47:24,725 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2042680234, now seen corresponding path program 186 times [2021-03-10 21:47:24,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:24,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557179665] [2021-03-10 21:47:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:24,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557179665] [2021-03-10 21:47:24,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430732823] [2021-03-10 21:47:24,973 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 [2021-03-10 21:47:24,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:47:24,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:25,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,237 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 [2021-03-10 21:47:25,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:25,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,242 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 15 treesize of output 11 [2021-03-10 21:47:25,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:25,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:25,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:25,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:25,251 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 17 treesize of output 13 [2021-03-10 21:47:25,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:25,301 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:25,301 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:25,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:25,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:25,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:25,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:25,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847418393] [2021-03-10 21:47:25,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:25,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:25,376 INFO L87 Difference]: Start difference. First operand 515 states and 1473 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) [2021-03-10 21:47:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:26,649 INFO L93 Difference]: Finished difference Result 602 states and 1621 transitions. [2021-03-10 21:47:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:47:26,651 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 [2021-03-10 21:47:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:26,651 INFO L225 Difference]: With dead ends: 602 [2021-03-10 21:47:26,651 INFO L226 Difference]: Without dead ends: 602 [2021-03-10 21:47:26,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1100.1ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:47:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-03-10 21:47:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 511. [2021-03-10 21:47:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.854901960784314) internal successors, (1456), 510 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1456 transitions. [2021-03-10 21:47:26,657 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1456 transitions. Word has length 17 [2021-03-10 21:47:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:26,657 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1456 transitions. [2021-03-10 21:47:26,657 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) [2021-03-10 21:47:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1456 transitions. [2021-03-10 21:47:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:26,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:26,658 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:26,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:26,873 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash 541673754, now seen corresponding path program 187 times [2021-03-10 21:47:26,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:26,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305713207] [2021-03-10 21:47:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:27,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305713207] [2021-03-10 21:47:27,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387046301] [2021-03-10 21:47:27,109 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 [2021-03-10 21:47:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:27,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:27,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:27,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:27,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:27,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:27,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,529 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:47:27,529 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:27,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:47:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:27,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:27,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:27,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559014764] [2021-03-10 21:47:27,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:27,586 INFO L87 Difference]: Start difference. First operand 511 states and 1456 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) [2021-03-10 21:47:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:28,952 INFO L93 Difference]: Finished difference Result 656 states and 1733 transitions. [2021-03-10 21:47:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:47:28,954 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 [2021-03-10 21:47:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:28,955 INFO L225 Difference]: With dead ends: 656 [2021-03-10 21:47:28,955 INFO L226 Difference]: Without dead ends: 656 [2021-03-10 21:47:28,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1280.3ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:47:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-03-10 21:47:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 520. [2021-03-10 21:47:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.867052023121387) internal successors, (1488), 519 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1488 transitions. [2021-03-10 21:47:28,960 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1488 transitions. Word has length 17 [2021-03-10 21:47:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:28,961 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 1488 transitions. [2021-03-10 21:47:28,961 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) [2021-03-10 21:47:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1488 transitions. [2021-03-10 21:47:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:28,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:28,961 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:29,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-03-10 21:47:29,162 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -947731242, now seen corresponding path program 188 times [2021-03-10 21:47:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:29,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177384057] [2021-03-10 21:47:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177384057] [2021-03-10 21:47:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374681145] [2021-03-10 21:47:29,367 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 [2021-03-10 21:47:29,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:29,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:29,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:29,719 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 16 treesize of output 12 [2021-03-10 21:47:29,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:29,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:29,725 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 15 treesize of output 11 [2021-03-10 21:47:29,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:29,779 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:47:29,779 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:29,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:29,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:47:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:29,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:29,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665369242] [2021-03-10 21:47:29,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:29,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:29,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:29,836 INFO L87 Difference]: Start difference. First operand 520 states and 1488 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) [2021-03-10 21:47:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:30,871 INFO L93 Difference]: Finished difference Result 612 states and 1684 transitions. [2021-03-10 21:47:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:47:30,871 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 [2021-03-10 21:47:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:30,871 INFO L225 Difference]: With dead ends: 612 [2021-03-10 21:47:30,871 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 21:47:30,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1017.5ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:47:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 21:47:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 522. [2021-03-10 21:47:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.867562380038388) internal successors, (1494), 521 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1494 transitions. [2021-03-10 21:47:30,877 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1494 transitions. Word has length 17 [2021-03-10 21:47:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:30,877 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1494 transitions. [2021-03-10 21:47:30,877 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) [2021-03-10 21:47:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1494 transitions. [2021-03-10 21:47:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:30,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:30,877 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:31,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1564 [2021-03-10 21:47:31,078 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:31,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:31,078 INFO L82 PathProgramCache]: Analyzing trace with hash 125354138, now seen corresponding path program 189 times [2021-03-10 21:47:31,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:31,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447441296] [2021-03-10 21:47:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:31,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447441296] [2021-03-10 21:47:31,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194122708] [2021-03-10 21:47:31,293 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 [2021-03-10 21:47:31,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:47:31,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:31,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:31,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:31,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:31,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:31,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:31,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:31,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:31,707 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:47:31,707 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:31,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:31,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:47:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:31,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:31,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:47:31,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750267974] [2021-03-10 21:47:31,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:31,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:31,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:31,774 INFO L87 Difference]: Start difference. First operand 522 states and 1494 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) [2021-03-10 21:47:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:32,304 INFO L93 Difference]: Finished difference Result 581 states and 1618 transitions. [2021-03-10 21:47:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:47:32,306 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 [2021-03-10 21:47:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:32,307 INFO L225 Difference]: With dead ends: 581 [2021-03-10 21:47:32,307 INFO L226 Difference]: Without dead ends: 581 [2021-03-10 21:47:32,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-03-10 21:47:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 523. [2021-03-10 21:47:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.867816091954023) internal successors, (1497), 522 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1497 transitions. [2021-03-10 21:47:32,312 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1497 transitions. Word has length 17 [2021-03-10 21:47:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:32,312 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1497 transitions. [2021-03-10 21:47:32,313 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) [2021-03-10 21:47:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1497 transitions. [2021-03-10 21:47:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:32,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:32,313 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:32,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1567,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:32,514 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash 150986938, now seen corresponding path program 190 times [2021-03-10 21:47:32,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:32,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472371317] [2021-03-10 21:47:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:32,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472371317] [2021-03-10 21:47:32,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442062172] [2021-03-10 21:47:32,708 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 [2021-03-10 21:47:32,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:47:32,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:32,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:33,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,028 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 15 treesize of output 11 [2021-03-10 21:47:33,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:33,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:33,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:33,084 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:47:33,084 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:33,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:33,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:47:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:33,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:33,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:33,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121273404] [2021-03-10 21:47:33,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:33,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:33,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:33,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:33,141 INFO L87 Difference]: Start difference. First operand 523 states and 1497 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) [2021-03-10 21:47:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:34,129 INFO L93 Difference]: Finished difference Result 673 states and 1794 transitions. [2021-03-10 21:47:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:47:34,131 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 [2021-03-10 21:47:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:34,132 INFO L225 Difference]: With dead ends: 673 [2021-03-10 21:47:34,132 INFO L226 Difference]: Without dead ends: 673 [2021-03-10 21:47:34,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:47:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-03-10 21:47:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 550. [2021-03-10 21:47:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 2.8961748633879782) internal successors, (1590), 549 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1590 transitions. [2021-03-10 21:47:34,138 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1590 transitions. Word has length 17 [2021-03-10 21:47:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:34,138 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1590 transitions. [2021-03-10 21:47:34,138 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) [2021-03-10 21:47:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1590 transitions. [2021-03-10 21:47:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:34,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:34,139 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:34,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:34,339 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1705036062, now seen corresponding path program 191 times [2021-03-10 21:47:34,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:34,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140715575] [2021-03-10 21:47:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140715575] [2021-03-10 21:47:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142030633] [2021-03-10 21:47:34,539 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 [2021-03-10 21:47:34,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:47:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:34,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:34,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:34,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:34,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:34,797 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 [2021-03-10 21:47:34,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:34,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:34,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:34,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:34,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:34,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:34,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:47:34,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:34,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:47:34,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:34,861 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:47:34,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:34,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:47:34,862 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:47:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:34,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:34,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:34,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828926383] [2021-03-10 21:47:34,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:34,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:34,957 INFO L87 Difference]: Start difference. First operand 550 states and 1590 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) [2021-03-10 21:47:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:36,289 INFO L93 Difference]: Finished difference Result 632 states and 1708 transitions. [2021-03-10 21:47:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:47:36,291 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 [2021-03-10 21:47:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:36,292 INFO L225 Difference]: With dead ends: 632 [2021-03-10 21:47:36,292 INFO L226 Difference]: Without dead ends: 626 [2021-03-10 21:47:36,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:47:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-03-10 21:47:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 553. [2021-03-10 21:47:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.885869565217391) internal successors, (1593), 552 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1593 transitions. [2021-03-10 21:47:36,298 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1593 transitions. Word has length 17 [2021-03-10 21:47:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:36,298 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 1593 transitions. [2021-03-10 21:47:36,298 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) [2021-03-10 21:47:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1593 transitions. [2021-03-10 21:47:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:36,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:36,299 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:36,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-03-10 21:47:36,499 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash 390629276, now seen corresponding path program 192 times [2021-03-10 21:47:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:36,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415370990] [2021-03-10 21:47:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:36,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415370990] [2021-03-10 21:47:36,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771159409] [2021-03-10 21:47:36,703 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 [2021-03-10 21:47:36,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:47:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:36,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:37,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:37,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,108 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:47:37,108 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:37,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:47:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:37,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:37,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142766960] [2021-03-10 21:47:37,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:37,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:37,177 INFO L87 Difference]: Start difference. First operand 553 states and 1593 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) [2021-03-10 21:47:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:39,290 INFO L93 Difference]: Finished difference Result 734 states and 1935 transitions. [2021-03-10 21:47:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:47:39,292 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 [2021-03-10 21:47:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:39,293 INFO L225 Difference]: With dead ends: 734 [2021-03-10 21:47:39,293 INFO L226 Difference]: Without dead ends: 732 [2021-03-10 21:47:39,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1681.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:47:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-03-10 21:47:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 565. [2021-03-10 21:47:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.897163120567376) internal successors, (1634), 564 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1634 transitions. [2021-03-10 21:47:39,300 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1634 transitions. Word has length 17 [2021-03-10 21:47:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:39,300 INFO L480 AbstractCegarLoop]: Abstraction has 565 states and 1634 transitions. [2021-03-10 21:47:39,300 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) [2021-03-10 21:47:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1634 transitions. [2021-03-10 21:47:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:39,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:39,301 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:39,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-03-10 21:47:39,501 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash -529071432, now seen corresponding path program 193 times [2021-03-10 21:47:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:39,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252403565] [2021-03-10 21:47:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:39,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252403565] [2021-03-10 21:47:39,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819381867] [2021-03-10 21:47:39,728 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 [2021-03-10 21:47:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:40,112 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 [2021-03-10 21:47:40,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:40,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:40,123 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 [2021-03-10 21:47:40,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:40,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:40,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:40,133 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 17 treesize of output 13 [2021-03-10 21:47:40,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:40,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:40,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:47:40,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:40,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:47:40,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:40,240 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:47:40,240 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:40,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:47:40,242 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:47:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:40,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:40,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:40,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405039739] [2021-03-10 21:47:40,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:40,335 INFO L87 Difference]: Start difference. First operand 565 states and 1634 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) [2021-03-10 21:47:41,969 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 21:47:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:42,088 INFO L93 Difference]: Finished difference Result 645 states and 1756 transitions. [2021-03-10 21:47:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:47:42,090 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 [2021-03-10 21:47:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:42,091 INFO L225 Difference]: With dead ends: 645 [2021-03-10 21:47:42,091 INFO L226 Difference]: Without dead ends: 639 [2021-03-10 21:47:42,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1618.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:47:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-03-10 21:47:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 568. [2021-03-10 21:47:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.8853615520282188) internal successors, (1636), 567 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1636 transitions. [2021-03-10 21:47:42,098 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1636 transitions. Word has length 17 [2021-03-10 21:47:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:42,098 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1636 transitions. [2021-03-10 21:47:42,098 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) [2021-03-10 21:47:42,098 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1636 transitions. [2021-03-10 21:47:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:42,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:42,099 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:42,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1579 [2021-03-10 21:47:42,299 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash 398359674, now seen corresponding path program 194 times [2021-03-10 21:47:42,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:42,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049839236] [2021-03-10 21:47:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049839236] [2021-03-10 21:47:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190875146] [2021-03-10 21:47:42,524 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 [2021-03-10 21:47:42,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:42,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:42,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:42,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:42,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:42,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:42,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,845 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 16 treesize of output 12 [2021-03-10 21:47:42,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:42,853 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 17 treesize of output 13 [2021-03-10 21:47:42,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:42,943 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:42,943 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:42,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:42,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:43,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:43,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713279745] [2021-03-10 21:47:43,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:43,086 INFO L87 Difference]: Start difference. First operand 568 states and 1636 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) [2021-03-10 21:47:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:44,899 INFO L93 Difference]: Finished difference Result 767 states and 1965 transitions. [2021-03-10 21:47:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:47:44,901 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 [2021-03-10 21:47:44,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:44,902 INFO L225 Difference]: With dead ends: 767 [2021-03-10 21:47:44,902 INFO L226 Difference]: Without dead ends: 765 [2021-03-10 21:47:44,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1592.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:47:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-03-10 21:47:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 568. [2021-03-10 21:47:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.880070546737213) internal successors, (1633), 567 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1633 transitions. [2021-03-10 21:47:44,909 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1633 transitions. Word has length 17 [2021-03-10 21:47:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:44,909 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1633 transitions. [2021-03-10 21:47:44,909 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) [2021-03-10 21:47:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1633 transitions. [2021-03-10 21:47:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:44,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:44,910 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:45,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1584,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:45,110 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1199975902, now seen corresponding path program 195 times [2021-03-10 21:47:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:45,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24325206] [2021-03-10 21:47:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:45,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24325206] [2021-03-10 21:47:45,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312217445] [2021-03-10 21:47:45,349 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 [2021-03-10 21:47:45,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:47:45,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:45,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:45,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:45,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:45,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,664 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 [2021-03-10 21:47:45,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:45,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:45,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:45,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:45,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:45,768 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:45,768 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:45,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:45,770 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:45,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:45,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692982188] [2021-03-10 21:47:45,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:45,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:45,969 INFO L87 Difference]: Start difference. First operand 568 states and 1633 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) [2021-03-10 21:47:47,500 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:47:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:48,283 INFO L93 Difference]: Finished difference Result 720 states and 1882 transitions. [2021-03-10 21:47:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:47:48,285 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 [2021-03-10 21:47:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:48,286 INFO L225 Difference]: With dead ends: 720 [2021-03-10 21:47:48,286 INFO L226 Difference]: Without dead ends: 715 [2021-03-10 21:47:48,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2043.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:47:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-03-10 21:47:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 575. [2021-03-10 21:47:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.8780487804878048) internal successors, (1652), 574 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1652 transitions. [2021-03-10 21:47:48,293 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1652 transitions. Word has length 17 [2021-03-10 21:47:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:48,293 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1652 transitions. [2021-03-10 21:47:48,293 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) [2021-03-10 21:47:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1652 transitions. [2021-03-10 21:47:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:48,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:48,294 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:48,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-03-10 21:47:48,509 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:48,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1376647688, now seen corresponding path program 196 times [2021-03-10 21:47:48,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:48,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056671208] [2021-03-10 21:47:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:48,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056671208] [2021-03-10 21:47:48,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200768807] [2021-03-10 21:47:48,745 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 [2021-03-10 21:47:48,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:47:48,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:48,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:49,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,071 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 [2021-03-10 21:47:49,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:49,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:49,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,089 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 [2021-03-10 21:47:49,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:49,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:49,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:49,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:49,187 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:49,187 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:49,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:49,189 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:49,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:49,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:47:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962274557] [2021-03-10 21:47:49,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:49,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:49,336 INFO L87 Difference]: Start difference. First operand 575 states and 1652 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) [2021-03-10 21:47:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:51,107 INFO L93 Difference]: Finished difference Result 696 states and 1845 transitions. [2021-03-10 21:47:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:47:51,109 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 [2021-03-10 21:47:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:51,110 INFO L225 Difference]: With dead ends: 696 [2021-03-10 21:47:51,110 INFO L226 Difference]: Without dead ends: 696 [2021-03-10 21:47:51,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1496.1ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:47:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-03-10 21:47:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 546. [2021-03-10 21:47:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.851376146788991) internal successors, (1554), 545 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1554 transitions. [2021-03-10 21:47:51,117 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1554 transitions. Word has length 17 [2021-03-10 21:47:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:51,117 INFO L480 AbstractCegarLoop]: Abstraction has 546 states and 1554 transitions. [2021-03-10 21:47:51,117 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) [2021-03-10 21:47:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1554 transitions. [2021-03-10 21:47:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:51,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:51,117 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:51,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:51,318 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1216001056, now seen corresponding path program 197 times [2021-03-10 21:47:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:51,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816065437] [2021-03-10 21:47:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:47:51,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816065437] [2021-03-10 21:47:51,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578916517] [2021-03-10 21:47:51,522 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 [2021-03-10 21:47:51,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:47:51,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:51,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:51,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,800 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 [2021-03-10 21:47:51,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:51,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:51,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,828 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 [2021-03-10 21:47:51,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,930 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:51,930 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:51,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:51,932 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:52,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:52,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:47:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815575395] [2021-03-10 21:47:52,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:52,120 INFO L87 Difference]: Start difference. First operand 546 states and 1554 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) [2021-03-10 21:47:53,617 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:47:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:54,113 INFO L93 Difference]: Finished difference Result 613 states and 1658 transitions. [2021-03-10 21:47:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:47:54,116 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 [2021-03-10 21:47:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:54,117 INFO L225 Difference]: With dead ends: 613 [2021-03-10 21:47:54,117 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 21:47:54,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1764.2ms TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:47:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 21:47:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 545. [2021-03-10 21:47:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.8474264705882355) internal successors, (1549), 544 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1549 transitions. [2021-03-10 21:47:54,122 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1549 transitions. Word has length 17 [2021-03-10 21:47:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:54,122 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 1549 transitions. [2021-03-10 21:47:54,122 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) [2021-03-10 21:47:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1549 transitions. [2021-03-10 21:47:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:54,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:54,123 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:54,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-03-10 21:47:54,324 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:54,324 INFO L82 PathProgramCache]: Analyzing trace with hash -17959942, now seen corresponding path program 198 times [2021-03-10 21:47:54,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:54,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864940006] [2021-03-10 21:47:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:54,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864940006] [2021-03-10 21:47:54,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042161899] [2021-03-10 21:47:54,549 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 [2021-03-10 21:47:54,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:47:54,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:54,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:54,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:54,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:54,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:54,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,853 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 [2021-03-10 21:47:54,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:54,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:54,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:54,958 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:54,958 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:54,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:54,960 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:55,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:55,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:47:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594322250] [2021-03-10 21:47:55,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:55,104 INFO L87 Difference]: Start difference. First operand 545 states and 1549 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) [2021-03-10 21:47:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:56,309 INFO L93 Difference]: Finished difference Result 634 states and 1689 transitions. [2021-03-10 21:47:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:47:56,311 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 [2021-03-10 21:47:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:56,312 INFO L225 Difference]: With dead ends: 634 [2021-03-10 21:47:56,312 INFO L226 Difference]: Without dead ends: 630 [2021-03-10 21:47:56,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1022.1ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:47:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-03-10 21:47:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 539. [2021-03-10 21:47:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.8345724907063197) internal successors, (1525), 538 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1525 transitions. [2021-03-10 21:47:56,325 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1525 transitions. Word has length 17 [2021-03-10 21:47:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:56,325 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 1525 transitions. [2021-03-10 21:47:56,325 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) [2021-03-10 21:47:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1525 transitions. [2021-03-10 21:47:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:56,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:56,325 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:56,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1603,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:56,531 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash 783656286, now seen corresponding path program 199 times [2021-03-10 21:47:56,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:56,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571473337] [2021-03-10 21:47:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:56,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571473337] [2021-03-10 21:47:56,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384543344] [2021-03-10 21:47:56,746 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 [2021-03-10 21:47:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:56,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:56,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,915 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 15 treesize of output 11 [2021-03-10 21:47:56,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:56,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:56,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:56,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:56,980 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:56,980 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:56,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:56,982 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:57,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:57,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:47:57,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576730054] [2021-03-10 21:47:57,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:57,194 INFO L87 Difference]: Start difference. First operand 539 states and 1525 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) [2021-03-10 21:47:58,165 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:47:58,484 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:47:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:58,798 INFO L93 Difference]: Finished difference Result 614 states and 1668 transitions. [2021-03-10 21:47:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:47:58,801 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 [2021-03-10 21:47:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:58,802 INFO L225 Difference]: With dead ends: 614 [2021-03-10 21:47:58,802 INFO L226 Difference]: Without dead ends: 608 [2021-03-10 21:47:58,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1516.5ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:47:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-03-10 21:47:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 547. [2021-03-10 21:47:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8241758241758244) internal successors, (1542), 546 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1542 transitions. [2021-03-10 21:47:58,808 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1542 transitions. Word has length 17 [2021-03-10 21:47:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:58,808 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1542 transitions. [2021-03-10 21:47:58,808 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) [2021-03-10 21:47:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1542 transitions. [2021-03-10 21:47:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:58,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:58,809 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:59,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1607,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:59,009 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1792967304, now seen corresponding path program 200 times [2021-03-10 21:47:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:59,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271152652] [2021-03-10 21:47:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:59,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271152652] [2021-03-10 21:47:59,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827933383] [2021-03-10 21:47:59,232 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 [2021-03-10 21:47:59,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:59,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:59,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:47:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:59,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:59,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,525 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 [2021-03-10 21:47:59,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:47:59,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:59,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,658 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:47:59,659 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:47:59,659 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:59,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:47:59,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:47:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:59,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:59,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:47:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299686044] [2021-03-10 21:47:59,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:59,812 INFO L87 Difference]: Start difference. First operand 547 states and 1542 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) [2021-03-10 21:48:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:01,032 INFO L93 Difference]: Finished difference Result 611 states and 1656 transitions. [2021-03-10 21:48:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:48:01,034 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 [2021-03-10 21:48:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:01,035 INFO L225 Difference]: With dead ends: 611 [2021-03-10 21:48:01,035 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 21:48:01,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1097.1ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:48:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 21:48:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 541. [2021-03-10 21:48:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.8092592592592593) internal successors, (1517), 540 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) [2021-03-10 21:48:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1517 transitions. [2021-03-10 21:48:01,041 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1517 transitions. Word has length 17 [2021-03-10 21:48:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:01,041 INFO L480 AbstractCegarLoop]: Abstraction has 541 states and 1517 transitions. [2021-03-10 21:48:01,041 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) [2021-03-10 21:48:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1517 transitions. [2021-03-10 21:48:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:01,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:01,042 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:01,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1612,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:01,242 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 791386684, now seen corresponding path program 201 times [2021-03-10 21:48:01,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:01,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032892723] [2021-03-10 21:48:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:01,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032892723] [2021-03-10 21:48:01,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034144423] [2021-03-10 21:48:01,449 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 [2021-03-10 21:48:01,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:48:01,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:01,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:01,837 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 [2021-03-10 21:48:01,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:01,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:01,845 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 16 treesize of output 12 [2021-03-10 21:48:01,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:01,909 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:48:01,909 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:01,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:01,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:48:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:01,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:01,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:48:01,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131585517] [2021-03-10 21:48:01,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:48:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:01,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:48:01,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:48:01,967 INFO L87 Difference]: Start difference. First operand 541 states and 1517 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) [2021-03-10 21:48:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:02,778 INFO L93 Difference]: Finished difference Result 621 states and 1686 transitions. [2021-03-10 21:48:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:48:02,781 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 [2021-03-10 21:48:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:02,782 INFO L225 Difference]: With dead ends: 621 [2021-03-10 21:48:02,782 INFO L226 Difference]: Without dead ends: 621 [2021-03-10 21:48:02,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:48:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-03-10 21:48:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 523. [2021-03-10 21:48:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.82183908045977) internal successors, (1473), 522 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1473 transitions. [2021-03-10 21:48:02,787 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1473 transitions. Word has length 17 [2021-03-10 21:48:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:02,787 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1473 transitions. [2021-03-10 21:48:02,787 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) [2021-03-10 21:48:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1473 transitions. [2021-03-10 21:48:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:02,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:02,788 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:02,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1616,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:02,989 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash -38966150, now seen corresponding path program 202 times [2021-03-10 21:48:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:02,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495156958] [2021-03-10 21:48:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:03,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495156958] [2021-03-10 21:48:03,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950963244] [2021-03-10 21:48:03,224 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 [2021-03-10 21:48:03,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:48:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:03,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,559 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 [2021-03-10 21:48:03,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:03,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,569 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 [2021-03-10 21:48:03,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:03,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:03,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:03,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:03,586 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 [2021-03-10 21:48:03,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:03,680 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:03,680 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:03,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:03,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:03,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:03,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:48:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121553986] [2021-03-10 21:48:03,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:48:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:48:03,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:48:03,813 INFO L87 Difference]: Start difference. First operand 523 states and 1473 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) [2021-03-10 21:48:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:04,909 INFO L93 Difference]: Finished difference Result 661 states and 1748 transitions. [2021-03-10 21:48:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:48:04,912 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 [2021-03-10 21:48:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:04,913 INFO L225 Difference]: With dead ends: 661 [2021-03-10 21:48:04,913 INFO L226 Difference]: Without dead ends: 659 [2021-03-10 21:48:04,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 968.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:48:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-10 21:48:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 549. [2021-03-10 21:48:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.841240875912409) internal successors, (1557), 548 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1557 transitions. [2021-03-10 21:48:04,919 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1557 transitions. Word has length 17 [2021-03-10 21:48:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:04,919 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1557 transitions. [2021-03-10 21:48:04,919 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) [2021-03-10 21:48:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1557 transitions. [2021-03-10 21:48:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:04,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:04,920 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:05,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:05,120 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:05,120 INFO L82 PathProgramCache]: Analyzing trace with hash 762650078, now seen corresponding path program 203 times [2021-03-10 21:48:05,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:05,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099970015] [2021-03-10 21:48:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099970015] [2021-03-10 21:48:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574109806] [2021-03-10 21:48:05,350 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 [2021-03-10 21:48:05,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:48:05,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:05,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:05,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:05,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:05,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:05,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:05,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:05,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:05,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:05,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:05,814 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:05,814 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:05,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:05,816 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:06,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:06,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:48:06,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442795378] [2021-03-10 21:48:06,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:48:06,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:48:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:48:06,025 INFO L87 Difference]: Start difference. First operand 549 states and 1557 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:07,218 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:48:07,501 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:48:07,745 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:48:08,165 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:48:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:08,636 INFO L93 Difference]: Finished difference Result 659 states and 1727 transitions. [2021-03-10 21:48:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:48:08,639 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 [2021-03-10 21:48:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:08,640 INFO L225 Difference]: With dead ends: 659 [2021-03-10 21:48:08,640 INFO L226 Difference]: Without dead ends: 649 [2021-03-10 21:48:08,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2201.1ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:48:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-03-10 21:48:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 551. [2021-03-10 21:48:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.829090909090909) internal successors, (1556), 550 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1556 transitions. [2021-03-10 21:48:08,646 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1556 transitions. Word has length 17 [2021-03-10 21:48:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:08,646 INFO L480 AbstractCegarLoop]: Abstraction has 551 states and 1556 transitions. [2021-03-10 21:48:08,646 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) [2021-03-10 21:48:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1556 transitions. [2021-03-10 21:48:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:08,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:08,647 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:08,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1623,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:08,849 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1813973512, now seen corresponding path program 204 times [2021-03-10 21:48:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:08,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112842627] [2021-03-10 21:48:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:09,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112842627] [2021-03-10 21:48:09,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461363188] [2021-03-10 21:48:09,041 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 [2021-03-10 21:48:09,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:48:09,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:09,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:09,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:09,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:09,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,348 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 15 treesize of output 11 [2021-03-10 21:48:09,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:09,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:09,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:09,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:09,363 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 17 treesize of output 13 [2021-03-10 21:48:09,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:09,465 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:09,465 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:09,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:09,467 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:09,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:09,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:48:09,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114359751] [2021-03-10 21:48:09,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:48:09,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:48:09,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:48:09,592 INFO L87 Difference]: Start difference. First operand 551 states and 1556 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) [2021-03-10 21:48:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:11,257 INFO L93 Difference]: Finished difference Result 644 states and 1699 transitions. [2021-03-10 21:48:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:48:11,259 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 [2021-03-10 21:48:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:11,260 INFO L225 Difference]: With dead ends: 644 [2021-03-10 21:48:11,260 INFO L226 Difference]: Without dead ends: 640 [2021-03-10 21:48:11,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1482.8ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:48:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-03-10 21:48:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 538. [2021-03-10 21:48:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.8063314711359406) internal successors, (1507), 537 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1507 transitions. [2021-03-10 21:48:11,266 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1507 transitions. Word has length 17 [2021-03-10 21:48:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:11,266 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 1507 transitions. [2021-03-10 21:48:11,266 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) [2021-03-10 21:48:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1507 transitions. [2021-03-10 21:48:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:11,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:11,267 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:11,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:11,468 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 770380476, now seen corresponding path program 205 times [2021-03-10 21:48:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:11,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223779892] [2021-03-10 21:48:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:11,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223779892] [2021-03-10 21:48:11,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351206750] [2021-03-10 21:48:11,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:48:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:11,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:12,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:12,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:12,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:12,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:12,149 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 15 treesize of output 11 [2021-03-10 21:48:12,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,214 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:48:12,214 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:12,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:48:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:12,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:12,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:48:12,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445078620] [2021-03-10 21:48:12,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:48:12,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:48:12,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:48:12,274 INFO L87 Difference]: Start difference. First operand 538 states and 1507 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) [2021-03-10 21:48:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:13,951 INFO L93 Difference]: Finished difference Result 653 states and 1715 transitions. [2021-03-10 21:48:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:48:13,953 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 [2021-03-10 21:48:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:13,954 INFO L225 Difference]: With dead ends: 653 [2021-03-10 21:48:13,954 INFO L226 Difference]: Without dead ends: 653 [2021-03-10 21:48:13,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1322.8ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:48:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-03-10 21:48:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 532. [2021-03-10 21:48:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.7966101694915255) internal successors, (1485), 531 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1485 transitions. [2021-03-10 21:48:13,960 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1485 transitions. Word has length 17 [2021-03-10 21:48:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:13,960 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1485 transitions. [2021-03-10 21:48:13,960 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) [2021-03-10 21:48:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1485 transitions. [2021-03-10 21:48:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:13,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:13,961 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:14,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1632 [2021-03-10 21:48:14,175 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:14,175 INFO L82 PathProgramCache]: Analyzing trace with hash -719024520, now seen corresponding path program 206 times [2021-03-10 21:48:14,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:14,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971283572] [2021-03-10 21:48:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:14,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971283572] [2021-03-10 21:48:14,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334040891] [2021-03-10 21:48:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:48:14,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:48:14,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:14,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:14,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:14,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:14,753 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 15 treesize of output 11 [2021-03-10 21:48:14,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:14,810 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:48:14,810 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:14,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:14,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:48:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:14,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:14,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:48:14,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699944331] [2021-03-10 21:48:14,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:48:14,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:48:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:48:14,875 INFO L87 Difference]: Start difference. First operand 532 states and 1485 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) [2021-03-10 21:48:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:15,653 INFO L93 Difference]: Finished difference Result 610 states and 1628 transitions. [2021-03-10 21:48:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:48:15,656 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 [2021-03-10 21:48:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:15,657 INFO L225 Difference]: With dead ends: 610 [2021-03-10 21:48:15,657 INFO L226 Difference]: Without dead ends: 610 [2021-03-10 21:48:15,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-03-10 21:48:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 506. [2021-03-10 21:48:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.8059405940594058) internal successors, (1417), 505 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1417 transitions. [2021-03-10 21:48:15,662 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1417 transitions. Word has length 17 [2021-03-10 21:48:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:15,662 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1417 transitions. [2021-03-10 21:48:15,662 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) [2021-03-10 21:48:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1417 transitions. [2021-03-10 21:48:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:15,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:15,662 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:15,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1635,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:15,863 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:15,863 INFO L82 PathProgramCache]: Analyzing trace with hash -690158598, now seen corresponding path program 207 times [2021-03-10 21:48:15,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:15,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036266437] [2021-03-10 21:48:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:16,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036266437] [2021-03-10 21:48:16,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519886247] [2021-03-10 21:48:16,119 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 [2021-03-10 21:48:16,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:48:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:16,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,454 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 [2021-03-10 21:48:16,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:16,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,464 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 [2021-03-10 21:48:16,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:16,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:16,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:16,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:16,566 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:16,566 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:16,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:16,568 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:16,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:16,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:48:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637768409] [2021-03-10 21:48:16,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:48:16,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:48:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:16,719 INFO L87 Difference]: Start difference. First operand 506 states and 1417 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) [2021-03-10 21:48:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:17,445 INFO L93 Difference]: Finished difference Result 628 states and 1638 transitions. [2021-03-10 21:48:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:48:17,447 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 [2021-03-10 21:48:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:17,448 INFO L225 Difference]: With dead ends: 628 [2021-03-10 21:48:17,448 INFO L226 Difference]: Without dead ends: 628 [2021-03-10 21:48:17,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:48:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-03-10 21:48:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 522. [2021-03-10 21:48:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.81957773512476) internal successors, (1469), 521 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1469 transitions. [2021-03-10 21:48:17,453 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1469 transitions. Word has length 17 [2021-03-10 21:48:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:17,454 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1469 transitions. [2021-03-10 21:48:17,454 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) [2021-03-10 21:48:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1469 transitions. [2021-03-10 21:48:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:17,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:17,454 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:17,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1638,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:17,655 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 111457630, now seen corresponding path program 208 times [2021-03-10 21:48:17,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:17,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048303842] [2021-03-10 21:48:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:17,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048303842] [2021-03-10 21:48:17,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292839261] [2021-03-10 21:48:17,933 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 [2021-03-10 21:48:17,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:48:17,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:18,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:18,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:18,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:18,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:18,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,342 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:18,342 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:18,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:18,343 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:18,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:18,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:48:18,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307091366] [2021-03-10 21:48:18,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:48:18,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:18,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:48:18,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:18,458 INFO L87 Difference]: Start difference. First operand 522 states and 1469 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) [2021-03-10 21:48:19,298 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:48:19,588 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:48:19,901 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:48:20,199 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:48:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:21,152 INFO L93 Difference]: Finished difference Result 647 states and 1673 transitions. [2021-03-10 21:48:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:48:21,154 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 [2021-03-10 21:48:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:21,155 INFO L225 Difference]: With dead ends: 647 [2021-03-10 21:48:21,155 INFO L226 Difference]: Without dead ends: 637 [2021-03-10 21:48:21,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2299.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:48:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-03-10 21:48:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 528. [2021-03-10 21:48:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.821631878557875) internal successors, (1487), 527 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1487 transitions. [2021-03-10 21:48:21,161 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1487 transitions. Word has length 17 [2021-03-10 21:48:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:21,161 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 1487 transitions. [2021-03-10 21:48:21,161 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) [2021-03-10 21:48:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1487 transitions. [2021-03-10 21:48:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:21,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:21,162 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:21,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1642,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:21,362 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1829801336, now seen corresponding path program 209 times [2021-03-10 21:48:21,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:21,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290125074] [2021-03-10 21:48:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290125074] [2021-03-10 21:48:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146824268] [2021-03-10 21:48:21,665 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 [2021-03-10 21:48:21,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:48:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:22,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:22,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:22,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:22,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:22,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:22,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:22,191 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:22,192 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:22,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:22,194 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:22,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:22,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:48:22,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937388889] [2021-03-10 21:48:22,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:48:22,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:22,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:48:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:22,355 INFO L87 Difference]: Start difference. First operand 528 states and 1487 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) [2021-03-10 21:48:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:23,785 INFO L93 Difference]: Finished difference Result 623 states and 1640 transitions. [2021-03-10 21:48:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:48:23,787 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 [2021-03-10 21:48:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:23,788 INFO L225 Difference]: With dead ends: 623 [2021-03-10 21:48:23,788 INFO L226 Difference]: Without dead ends: 623 [2021-03-10 21:48:23,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1469.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:48:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-03-10 21:48:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 515. [2021-03-10 21:48:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.8035019455252916) internal successors, (1441), 514 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) [2021-03-10 21:48:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1441 transitions. [2021-03-10 21:48:23,794 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1441 transitions. Word has length 17 [2021-03-10 21:48:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:23,794 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1441 transitions. [2021-03-10 21:48:23,794 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) [2021-03-10 21:48:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1441 transitions. [2021-03-10 21:48:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:23,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:23,794 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:23,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1647,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:23,995 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:23,995 INFO L82 PathProgramCache]: Analyzing trace with hash 119188028, now seen corresponding path program 210 times [2021-03-10 21:48:23,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:23,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189768958] [2021-03-10 21:48:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189768958] [2021-03-10 21:48:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153012192] [2021-03-10 21:48:24,267 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 [2021-03-10 21:48:24,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:48:24,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:24,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:24,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:24,737 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 [2021-03-10 21:48:24,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:24,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:24,816 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:48:24,816 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:24,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:24,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:48:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:48:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685455295] [2021-03-10 21:48:24,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:48:24,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:48:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:24,891 INFO L87 Difference]: Start difference. First operand 515 states and 1441 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) [2021-03-10 21:48:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:26,892 INFO L93 Difference]: Finished difference Result 675 states and 1736 transitions. [2021-03-10 21:48:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:48:26,895 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 [2021-03-10 21:48:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:26,896 INFO L225 Difference]: With dead ends: 675 [2021-03-10 21:48:26,896 INFO L226 Difference]: Without dead ends: 675 [2021-03-10 21:48:26,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1565.0ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:48:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-03-10 21:48:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 512. [2021-03-10 21:48:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 2.8043052837573383) internal successors, (1433), 511 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1433 transitions. [2021-03-10 21:48:26,902 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1433 transitions. Word has length 17 [2021-03-10 21:48:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:26,902 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 1433 transitions. [2021-03-10 21:48:26,902 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) [2021-03-10 21:48:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1433 transitions. [2021-03-10 21:48:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:26,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:26,902 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:27,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1651,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:27,103 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1370216968, now seen corresponding path program 211 times [2021-03-10 21:48:27,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:27,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347765114] [2021-03-10 21:48:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347765114] [2021-03-10 21:48:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536636926] [2021-03-10 21:48:27,348 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 [2021-03-10 21:48:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:27,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:27,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:27,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:27,808 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 16 treesize of output 12 [2021-03-10 21:48:27,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:27,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:27,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:27,882 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:48:27,882 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:27,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:27,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:48:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:27,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:27,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:48:27,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379473141] [2021-03-10 21:48:27,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:48:27,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:48:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:27,948 INFO L87 Difference]: Start difference. First operand 512 states and 1433 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) [2021-03-10 21:48:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:31,297 INFO L93 Difference]: Finished difference Result 672 states and 1748 transitions. [2021-03-10 21:48:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:48:31,299 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 [2021-03-10 21:48:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:31,300 INFO L225 Difference]: With dead ends: 672 [2021-03-10 21:48:31,300 INFO L226 Difference]: Without dead ends: 672 [2021-03-10 21:48:31,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2659.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:48:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-10 21:48:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-10 21:48:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.8035019455252916) internal successors, (1441), 514 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) [2021-03-10 21:48:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1441 transitions. [2021-03-10 21:48:31,306 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1441 transitions. Word has length 17 [2021-03-10 21:48:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:31,306 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1441 transitions. [2021-03-10 21:48:31,306 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) [2021-03-10 21:48:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1441 transitions. [2021-03-10 21:48:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:31,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:31,307 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:31,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1654 [2021-03-10 21:48:31,507 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -297131588, now seen corresponding path program 212 times [2021-03-10 21:48:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:31,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261933672] [2021-03-10 21:48:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:31,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261933672] [2021-03-10 21:48:31,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637442781] [2021-03-10 21:48:31,763 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 [2021-03-10 21:48:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:48:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:32,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,249 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 [2021-03-10 21:48:32,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,320 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:48:32,321 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:32,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:48:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:32,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:32,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:48:32,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603594174] [2021-03-10 21:48:32,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:48:32,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:32,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:48:32,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:32,400 INFO L87 Difference]: Start difference. First operand 515 states and 1441 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) [2021-03-10 21:48:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:33,297 INFO L93 Difference]: Finished difference Result 563 states and 1535 transitions. [2021-03-10 21:48:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:48:33,300 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 [2021-03-10 21:48:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:33,301 INFO L225 Difference]: With dead ends: 563 [2021-03-10 21:48:33,301 INFO L226 Difference]: Without dead ends: 563 [2021-03-10 21:48:33,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:48:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-03-10 21:48:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 518. [2021-03-10 21:48:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.804642166344294) internal successors, (1450), 517 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1450 transitions. [2021-03-10 21:48:33,306 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1450 transitions. Word has length 17 [2021-03-10 21:48:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:33,306 INFO L480 AbstractCegarLoop]: Abstraction has 518 states and 1450 transitions. [2021-03-10 21:48:33,306 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) [2021-03-10 21:48:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1450 transitions. [2021-03-10 21:48:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:33,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:33,307 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:33,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1657 [2021-03-10 21:48:33,507 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash 906074430, now seen corresponding path program 213 times [2021-03-10 21:48:33,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:33,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131306860] [2021-03-10 21:48:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:33,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131306860] [2021-03-10 21:48:33,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406147027] [2021-03-10 21:48:33,761 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 [2021-03-10 21:48:33,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:48:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:33,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:34,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:34,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:34,218 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 [2021-03-10 21:48:34,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:34,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:34,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:34,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:34,283 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:48:34,283 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:34,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:34,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:48:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:34,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:34,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:34,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940205138] [2021-03-10 21:48:34,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:34,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:34,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:34,368 INFO L87 Difference]: Start difference. First operand 518 states and 1450 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) [2021-03-10 21:48:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:35,359 INFO L93 Difference]: Finished difference Result 663 states and 1751 transitions. [2021-03-10 21:48:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:48:35,361 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 [2021-03-10 21:48:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:35,362 INFO L225 Difference]: With dead ends: 663 [2021-03-10 21:48:35,362 INFO L226 Difference]: Without dead ends: 663 [2021-03-10 21:48:35,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-10 21:48:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 570. [2021-03-10 21:48:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.838312829525483) internal successors, (1615), 569 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1615 transitions. [2021-03-10 21:48:35,368 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1615 transitions. Word has length 17 [2021-03-10 21:48:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:35,368 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1615 transitions. [2021-03-10 21:48:35,369 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) [2021-03-10 21:48:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1615 transitions. [2021-03-10 21:48:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:35,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:35,369 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:35,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-03-10 21:48:35,570 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1836957018, now seen corresponding path program 214 times [2021-03-10 21:48:35,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:35,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109296020] [2021-03-10 21:48:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:35,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109296020] [2021-03-10 21:48:35,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765833948] [2021-03-10 21:48:35,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:35,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:48:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:36,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:36,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:36,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:36,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:36,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:36,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:36,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:36,355 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 17 treesize of output 13 [2021-03-10 21:48:36,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:36,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:36,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:36,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:48:36,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:36,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:48:36,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:36,482 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:48:36,483 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:36,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:48:36,484 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:48:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:36,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:36,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:36,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547659159] [2021-03-10 21:48:36,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:36,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:36,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:36,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:36,604 INFO L87 Difference]: Start difference. First operand 570 states and 1615 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) [2021-03-10 21:48:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:38,001 INFO L93 Difference]: Finished difference Result 646 states and 1709 transitions. [2021-03-10 21:48:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:48:38,004 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 [2021-03-10 21:48:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:38,005 INFO L225 Difference]: With dead ends: 646 [2021-03-10 21:48:38,005 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 21:48:38,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1396.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:48:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 21:48:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 576. [2021-03-10 21:48:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.8191304347826085) internal successors, (1621), 575 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1621 transitions. [2021-03-10 21:48:38,011 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1621 transitions. Word has length 17 [2021-03-10 21:48:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:38,011 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 1621 transitions. [2021-03-10 21:48:38,011 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) [2021-03-10 21:48:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1621 transitions. [2021-03-10 21:48:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:38,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:38,012 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:38,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1662 [2021-03-10 21:48:38,212 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash -254947684, now seen corresponding path program 215 times [2021-03-10 21:48:38,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:38,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023035379] [2021-03-10 21:48:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:38,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023035379] [2021-03-10 21:48:38,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359003580] [2021-03-10 21:48:38,496 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 [2021-03-10 21:48:38,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:48:38,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:38,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,968 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 [2021-03-10 21:48:38,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:38,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:39,035 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:48:39,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:39,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:39,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:48:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:39,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:39,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720415638] [2021-03-10 21:48:39,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:39,123 INFO L87 Difference]: Start difference. First operand 576 states and 1621 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) [2021-03-10 21:48:40,719 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 21:48:41,357 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:48:41,891 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:48:42,167 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:48:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:42,462 INFO L93 Difference]: Finished difference Result 746 states and 1905 transitions. [2021-03-10 21:48:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:48:42,465 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 [2021-03-10 21:48:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:42,466 INFO L225 Difference]: With dead ends: 746 [2021-03-10 21:48:42,466 INFO L226 Difference]: Without dead ends: 746 [2021-03-10 21:48:42,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2906.2ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:48:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-03-10 21:48:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 573. [2021-03-10 21:48:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.832167832167832) internal successors, (1620), 572 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1620 transitions. [2021-03-10 21:48:42,474 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1620 transitions. Word has length 17 [2021-03-10 21:48:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:42,474 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1620 transitions. [2021-03-10 21:48:42,474 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) [2021-03-10 21:48:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1620 transitions. [2021-03-10 21:48:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:42,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:42,474 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:42,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1667 [2021-03-10 21:48:42,675 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1299101440, now seen corresponding path program 216 times [2021-03-10 21:48:42,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:42,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205740707] [2021-03-10 21:48:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205740707] [2021-03-10 21:48:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292286812] [2021-03-10 21:48:42,958 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 [2021-03-10 21:48:42,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:48:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:43,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:43,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:43,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:43,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:43,501 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 [2021-03-10 21:48:43,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:43,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:43,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:43,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:43,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:43,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:43,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:48:43,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:43,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:48:43,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:43,629 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:48:43,629 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:43,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:48:43,631 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:48:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:43,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:43,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:43,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838884766] [2021-03-10 21:48:43,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:43,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:43,746 INFO L87 Difference]: Start difference. First operand 573 states and 1620 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) [2021-03-10 21:48:45,645 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 21:48:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:45,721 INFO L93 Difference]: Finished difference Result 661 states and 1736 transitions. [2021-03-10 21:48:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:48:45,723 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 [2021-03-10 21:48:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:45,724 INFO L225 Difference]: With dead ends: 661 [2021-03-10 21:48:45,724 INFO L226 Difference]: Without dead ends: 655 [2021-03-10 21:48:45,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1961.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:48:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-03-10 21:48:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 576. [2021-03-10 21:48:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.8243478260869566) internal successors, (1624), 575 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1624 transitions. [2021-03-10 21:48:45,731 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1624 transitions. Word has length 17 [2021-03-10 21:48:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:45,731 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 1624 transitions. [2021-03-10 21:48:45,731 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) [2021-03-10 21:48:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1624 transitions. [2021-03-10 21:48:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:45,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:45,731 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:45,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1669,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:45,933 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -15305346, now seen corresponding path program 217 times [2021-03-10 21:48:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:45,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105218780] [2021-03-10 21:48:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:46,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105218780] [2021-03-10 21:48:46,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192905629] [2021-03-10 21:48:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:48:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:46,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:46,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:46,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:46,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:46,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:46,881 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:48:46,881 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:46,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:48:46,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:48:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:46,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:46,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:46,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370717639] [2021-03-10 21:48:46,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:46,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:46,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:46,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:46,964 INFO L87 Difference]: Start difference. First operand 576 states and 1624 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) [2021-03-10 21:48:49,600 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:48:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:49,881 INFO L93 Difference]: Finished difference Result 744 states and 1917 transitions. [2021-03-10 21:48:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:48:49,884 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 [2021-03-10 21:48:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:49,885 INFO L225 Difference]: With dead ends: 744 [2021-03-10 21:48:49,885 INFO L226 Difference]: Without dead ends: 744 [2021-03-10 21:48:49,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2499.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:48:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-03-10 21:48:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 582. [2021-03-10 21:48:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.8450946643717727) internal successors, (1653), 581 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1653 transitions. [2021-03-10 21:48:49,892 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1653 transitions. Word has length 17 [2021-03-10 21:48:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:49,892 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1653 transitions. [2021-03-10 21:48:49,892 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) [2021-03-10 21:48:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1653 transitions. [2021-03-10 21:48:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:49,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:49,893 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:50,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1674 [2021-03-10 21:48:50,093 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash -935006054, now seen corresponding path program 218 times [2021-03-10 21:48:50,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:50,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757989824] [2021-03-10 21:48:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757989824] [2021-03-10 21:48:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127893421] [2021-03-10 21:48:50,394 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 [2021-03-10 21:48:50,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:48:50,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:50,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:50,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:50,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:50,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:50,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:48:50,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:51,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:48:51,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:51,098 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-03-10 21:48:51,099 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:51,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:48:51,100 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:48:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:51,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:51,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:51,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7835913] [2021-03-10 21:48:51,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:51,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:51,217 INFO L87 Difference]: Start difference. First operand 582 states and 1653 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) [2021-03-10 21:48:52,484 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 21:48:52,943 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 21:48:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:53,153 INFO L93 Difference]: Finished difference Result 646 states and 1741 transitions. [2021-03-10 21:48:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:48:53,155 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 [2021-03-10 21:48:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:53,156 INFO L225 Difference]: With dead ends: 646 [2021-03-10 21:48:53,156 INFO L226 Difference]: Without dead ends: 640 [2021-03-10 21:48:53,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2058.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:48:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-03-10 21:48:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 583. [2021-03-10 21:48:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.8350515463917527) internal successors, (1650), 582 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1650 transitions. [2021-03-10 21:48:53,163 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1650 transitions. Word has length 17 [2021-03-10 21:48:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:53,163 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1650 transitions. [2021-03-10 21:48:53,163 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) [2021-03-10 21:48:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1650 transitions. [2021-03-10 21:48:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:53,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:53,163 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:53,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1676,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:53,364 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -7574948, now seen corresponding path program 219 times [2021-03-10 21:48:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:53,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392403885] [2021-03-10 21:48:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:53,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392403885] [2021-03-10 21:48:53,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496336178] [2021-03-10 21:48:53,644 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 [2021-03-10 21:48:53,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:48:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:54,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:54,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:54,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,129 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 [2021-03-10 21:48:54,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,137 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 16 treesize of output 12 [2021-03-10 21:48:54,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:54,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:54,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:54,244 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:54,244 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:54,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:54,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:54,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:54,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284858074] [2021-03-10 21:48:54,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:54,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:54,419 INFO L87 Difference]: Start difference. First operand 583 states and 1650 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) [2021-03-10 21:48:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:56,833 INFO L93 Difference]: Finished difference Result 748 states and 1881 transitions. [2021-03-10 21:48:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:48:56,835 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 [2021-03-10 21:48:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:56,836 INFO L225 Difference]: With dead ends: 748 [2021-03-10 21:48:56,836 INFO L226 Difference]: Without dead ends: 747 [2021-03-10 21:48:56,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1812.7ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:48:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-03-10 21:48:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 569. [2021-03-10 21:48:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.811619718309859) internal successors, (1597), 568 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1597 transitions. [2021-03-10 21:48:56,843 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1597 transitions. Word has length 17 [2021-03-10 21:48:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:56,843 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 1597 transitions. [2021-03-10 21:48:56,843 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) [2021-03-10 21:48:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1597 transitions. [2021-03-10 21:48:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:56,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:56,844 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:57,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:57,044 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash 794041280, now seen corresponding path program 220 times [2021-03-10 21:48:57,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:57,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885560900] [2021-03-10 21:48:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:57,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885560900] [2021-03-10 21:48:57,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042179456] [2021-03-10 21:48:57,366 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 [2021-03-10 21:48:57,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:48:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:48:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:57,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:48:57,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:57,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:57,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:57,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,841 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 [2021-03-10 21:48:57,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:57,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:57,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:57,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:57,965 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:48:57,966 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:48:57,966 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:48:57,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:48:57,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:48:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:58,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:58,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:48:58,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573492794] [2021-03-10 21:48:58,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:48:58,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:58,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:48:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:58,226 INFO L87 Difference]: Start difference. First operand 569 states and 1597 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) [2021-03-10 21:48:59,278 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:48:59,809 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:00,706 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:49:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,740 INFO L93 Difference]: Finished difference Result 657 states and 1736 transitions. [2021-03-10 21:49:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:49:00,742 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 [2021-03-10 21:49:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,743 INFO L225 Difference]: With dead ends: 657 [2021-03-10 21:49:00,743 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 21:49:00,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2252.6ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:49:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 21:49:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 573. [2021-03-10 21:49:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.8094405594405596) internal successors, (1607), 572 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) [2021-03-10 21:49:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1607 transitions. [2021-03-10 21:49:00,750 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1607 transitions. Word has length 17 [2021-03-10 21:49:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,750 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1607 transitions. [2021-03-10 21:49:00,750 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) [2021-03-10 21:49:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1607 transitions. [2021-03-10 21:49:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:00,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,751 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-03-10 21:49:00,957 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1782582310, now seen corresponding path program 221 times [2021-03-10 21:49:00,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476739751] [2021-03-10 21:49:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476739751] [2021-03-10 21:49:01,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61628115] [2021-03-10 21:49:01,165 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 [2021-03-10 21:49:01,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:49:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:01,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:01,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:01,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:01,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:01,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:01,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:01,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:01,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:01,816 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:01,817 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:01,817 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:01,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:01,820 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:02,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:02,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:49:02,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871447717] [2021-03-10 21:49:02,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:49:02,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:02,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:49:02,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:02,010 INFO L87 Difference]: Start difference. First operand 573 states and 1607 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) [2021-03-10 21:49:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:03,274 INFO L93 Difference]: Finished difference Result 646 states and 1720 transitions. [2021-03-10 21:49:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:49:03,277 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 [2021-03-10 21:49:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:03,278 INFO L225 Difference]: With dead ends: 646 [2021-03-10 21:49:03,278 INFO L226 Difference]: Without dead ends: 646 [2021-03-10 21:49:03,278 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1388.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:49:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-03-10 21:49:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 560. [2021-03-10 21:49:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.7960644007155637) internal successors, (1563), 559 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1563 transitions. [2021-03-10 21:49:03,284 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1563 transitions. Word has length 17 [2021-03-10 21:49:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:03,284 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 1563 transitions. [2021-03-10 21:49:03,284 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) [2021-03-10 21:49:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1563 transitions. [2021-03-10 21:49:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:03,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:03,284 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:03,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1690,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:03,485 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash 505854650, now seen corresponding path program 222 times [2021-03-10 21:49:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:03,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424253592] [2021-03-10 21:49:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:03,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424253592] [2021-03-10 21:49:03,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297926273] [2021-03-10 21:49:03,745 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 [2021-03-10 21:49:03,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:49:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:04,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,150 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 [2021-03-10 21:49:04,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:04,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:04,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:04,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:04,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:04,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:04,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:04,293 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:04,294 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:04,294 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:04,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:04,296 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:04,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:04,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692463598] [2021-03-10 21:49:04,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:04,509 INFO L87 Difference]: Start difference. First operand 560 states and 1563 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) [2021-03-10 21:49:06,186 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:06,916 INFO L93 Difference]: Finished difference Result 590 states and 1612 transitions. [2021-03-10 21:49:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:49:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:06,919 INFO L225 Difference]: With dead ends: 590 [2021-03-10 21:49:06,919 INFO L226 Difference]: Without dead ends: 586 [2021-03-10 21:49:06,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2034.9ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:49:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-03-10 21:49:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 563. [2021-03-10 21:49:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.788256227758007) internal successors, (1567), 562 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1567 transitions. [2021-03-10 21:49:06,925 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1567 transitions. Word has length 17 [2021-03-10 21:49:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:06,925 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 1567 transitions. [2021-03-10 21:49:06,925 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) [2021-03-10 21:49:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1567 transitions. [2021-03-10 21:49:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:06,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:06,926 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:07,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1694 [2021-03-10 21:49:07,126 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1517986152, now seen corresponding path program 223 times [2021-03-10 21:49:07,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:07,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135548468] [2021-03-10 21:49:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:07,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135548468] [2021-03-10 21:49:07,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240730180] [2021-03-10 21:49:07,373 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 [2021-03-10 21:49:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:07,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,729 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 16 treesize of output 12 [2021-03-10 21:49:07,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:07,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:07,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:07,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:07,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:07,762 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 [2021-03-10 21:49:07,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:07,875 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:07,876 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:07,876 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:07,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:07,879 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:08,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:08,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:49:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211359738] [2021-03-10 21:49:08,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:08,064 INFO L87 Difference]: Start difference. First operand 563 states and 1567 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) [2021-03-10 21:49:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:09,227 INFO L93 Difference]: Finished difference Result 752 states and 1917 transitions. [2021-03-10 21:49:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:49:09,229 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 [2021-03-10 21:49:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:09,230 INFO L225 Difference]: With dead ends: 752 [2021-03-10 21:49:09,230 INFO L226 Difference]: Without dead ends: 752 [2021-03-10 21:49:09,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 988.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-03-10 21:49:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 609. [2021-03-10 21:49:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 2.7828947368421053) internal successors, (1692), 608 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1692 transitions. [2021-03-10 21:49:09,239 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1692 transitions. Word has length 17 [2021-03-10 21:49:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:09,239 INFO L480 AbstractCegarLoop]: Abstraction has 609 states and 1692 transitions. [2021-03-10 21:49:09,239 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) [2021-03-10 21:49:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1692 transitions. [2021-03-10 21:49:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:09,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:09,240 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:09,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:09,455 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash -716369924, now seen corresponding path program 224 times [2021-03-10 21:49:09,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:09,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440723661] [2021-03-10 21:49:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:09,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440723661] [2021-03-10 21:49:09,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264000849] [2021-03-10 21:49:09,760 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 [2021-03-10 21:49:09,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:10,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,151 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 [2021-03-10 21:49:10,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:10,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:10,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:10,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:10,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:10,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:10,186 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 17 treesize of output 13 [2021-03-10 21:49:10,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:10,313 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:10,314 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:10,314 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:10,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:10,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:10,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:10,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:49:10,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240514851] [2021-03-10 21:49:10,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:10,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:10,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:10,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:10,584 INFO L87 Difference]: Start difference. First operand 609 states and 1692 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) [2021-03-10 21:49:11,627 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:49:12,068 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:12,911 INFO L93 Difference]: Finished difference Result 729 states and 1882 transitions. [2021-03-10 21:49:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:49:12,914 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 [2021-03-10 21:49:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:12,915 INFO L225 Difference]: With dead ends: 729 [2021-03-10 21:49:12,915 INFO L226 Difference]: Without dead ends: 723 [2021-03-10 21:49:12,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1956.8ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:49:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-03-10 21:49:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 616. [2021-03-10 21:49:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.7869918699186993) internal successors, (1714), 615 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1714 transitions. [2021-03-10 21:49:12,922 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1714 transitions. Word has length 17 [2021-03-10 21:49:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:12,922 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 1714 transitions. [2021-03-10 21:49:12,922 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) [2021-03-10 21:49:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1714 transitions. [2021-03-10 21:49:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:12,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:12,923 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:13,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1704,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:13,124 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1001973782, now seen corresponding path program 225 times [2021-03-10 21:49:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:13,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399554574] [2021-03-10 21:49:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:13,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399554574] [2021-03-10 21:49:13,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326550653] [2021-03-10 21:49:13,376 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 [2021-03-10 21:49:13,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:49:13,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,775 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 [2021-03-10 21:49:13,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,781 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 15 treesize of output 11 [2021-03-10 21:49:13,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:13,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,793 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 17 treesize of output 13 [2021-03-10 21:49:13,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,849 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:13,849 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:13,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:13,850 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:13,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:13,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:49:13,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804649384] [2021-03-10 21:49:13,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:13,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:13,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:13,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:13,933 INFO L87 Difference]: Start difference. First operand 616 states and 1714 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) [2021-03-10 21:49:15,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:15,241 INFO L93 Difference]: Finished difference Result 703 states and 1849 transitions. [2021-03-10 21:49:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:49:15,244 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 [2021-03-10 21:49:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:15,245 INFO L225 Difference]: With dead ends: 703 [2021-03-10 21:49:15,245 INFO L226 Difference]: Without dead ends: 703 [2021-03-10 21:49:15,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-03-10 21:49:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 610. [2021-03-10 21:49:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 2.77504105090312) internal successors, (1690), 609 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1690 transitions. [2021-03-10 21:49:15,252 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1690 transitions. Word has length 17 [2021-03-10 21:49:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:15,252 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 1690 transitions. [2021-03-10 21:49:15,252 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) [2021-03-10 21:49:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1690 transitions. [2021-03-10 21:49:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:15,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:15,253 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:15,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-03-10 21:49:15,453 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:15,453 INFO L82 PathProgramCache]: Analyzing trace with hash -708639526, now seen corresponding path program 226 times [2021-03-10 21:49:15,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:15,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325558139] [2021-03-10 21:49:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:15,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325558139] [2021-03-10 21:49:15,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726360936] [2021-03-10 21:49:15,656 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 [2021-03-10 21:49:15,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:15,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:16,098 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 15 treesize of output 11 [2021-03-10 21:49:16,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:16,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:16,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:16,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:16,206 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:49:16,206 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:16,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:16,208 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:49:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:16,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:16,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:49:16,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771399830] [2021-03-10 21:49:16,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:16,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:16,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:16,290 INFO L87 Difference]: Start difference. First operand 610 states and 1690 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) [2021-03-10 21:49:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:16,998 INFO L93 Difference]: Finished difference Result 714 states and 1875 transitions. [2021-03-10 21:49:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:49:17,000 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 [2021-03-10 21:49:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:17,001 INFO L225 Difference]: With dead ends: 714 [2021-03-10 21:49:17,001 INFO L226 Difference]: Without dead ends: 714 [2021-03-10 21:49:17,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-03-10 21:49:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 610. [2021-03-10 21:49:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 2.77504105090312) internal successors, (1690), 609 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1690 transitions. [2021-03-10 21:49:17,008 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1690 transitions. Word has length 17 [2021-03-10 21:49:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:17,008 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 1690 transitions. [2021-03-10 21:49:17,008 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) [2021-03-10 21:49:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1690 transitions. [2021-03-10 21:49:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:17,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:17,009 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:17,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1713 [2021-03-10 21:49:17,209 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -561657414, now seen corresponding path program 227 times [2021-03-10 21:49:17,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:17,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551351863] [2021-03-10 21:49:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:17,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551351863] [2021-03-10 21:49:17,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775308555] [2021-03-10 21:49:17,451 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 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 [2021-03-10 21:49:17,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:49:17,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:17,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:17,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:17,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:17,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:17,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:17,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:17,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:17,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:17,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:17,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:17,965 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:17,966 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:17,966 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:17,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:17,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:18,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:18,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:49:18,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340670677] [2021-03-10 21:49:18,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:18,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:18,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:18,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:18,188 INFO L87 Difference]: Start difference. First operand 610 states and 1690 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) [2021-03-10 21:49:19,414 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:19,711 INFO L93 Difference]: Finished difference Result 651 states and 1755 transitions. [2021-03-10 21:49:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:49:19,713 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 [2021-03-10 21:49:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:19,714 INFO L225 Difference]: With dead ends: 651 [2021-03-10 21:49:19,714 INFO L226 Difference]: Without dead ends: 647 [2021-03-10 21:49:19,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1364.2ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-03-10 21:49:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 608. [2021-03-10 21:49:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.769357495881384) internal successors, (1681), 607 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1681 transitions. [2021-03-10 21:49:19,720 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1681 transitions. Word has length 17 [2021-03-10 21:49:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:19,721 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 1681 transitions. [2021-03-10 21:49:19,721 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) [2021-03-10 21:49:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1681 transitions. [2021-03-10 21:49:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:19,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:19,721 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:19,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1716,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:19,922 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1167389920, now seen corresponding path program 228 times [2021-03-10 21:49:19,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:19,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683890247] [2021-03-10 21:49:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:20,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683890247] [2021-03-10 21:49:20,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045135138] [2021-03-10 21:49:20,137 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 [2021-03-10 21:49:20,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:49:20,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:20,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:20,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:20,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:20,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:49:20,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:20,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:49:20,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:20,711 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 [2021-03-10 21:49:20,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:20,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:20,725 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 17 treesize of output 13 [2021-03-10 21:49:20,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:20,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:49:20,740 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:20,850 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:49:20,852 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:49:20,852 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:20,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:49:20,855 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:49:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:20,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:20,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:49:20,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496959191] [2021-03-10 21:49:20,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:20,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:20,961 INFO L87 Difference]: Start difference. First operand 608 states and 1681 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) [2021-03-10 21:49:21,826 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:49:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:22,054 INFO L93 Difference]: Finished difference Result 623 states and 1705 transitions. [2021-03-10 21:49:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:49:22,057 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 [2021-03-10 21:49:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:22,058 INFO L225 Difference]: With dead ends: 623 [2021-03-10 21:49:22,058 INFO L226 Difference]: Without dead ends: 615 [2021-03-10 21:49:22,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1071.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-03-10 21:49:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 606. [2021-03-10 21:49:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.7636363636363637) internal successors, (1672), 605 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1672 transitions. [2021-03-10 21:49:22,064 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1672 transitions. Word has length 17 [2021-03-10 21:49:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:22,064 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1672 transitions. [2021-03-10 21:49:22,064 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) [2021-03-10 21:49:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1672 transitions. [2021-03-10 21:49:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:22,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:22,065 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:22,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-03-10 21:49:22,265 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1096093220, now seen corresponding path program 229 times [2021-03-10 21:49:22,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:22,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929342123] [2021-03-10 21:49:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:22,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929342123] [2021-03-10 21:49:22,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52785137] [2021-03-10 21:49:22,567 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 [2021-03-10 21:49:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,006 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 [2021-03-10 21:49:23,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:23,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,026 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 [2021-03-10 21:49:23,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:23,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,153 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:23,154 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:23,155 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:23,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:23,157 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:23,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:23,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364566137] [2021-03-10 21:49:23,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:23,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:23,345 INFO L87 Difference]: Start difference. First operand 606 states and 1672 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) [2021-03-10 21:49:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:24,398 INFO L93 Difference]: Finished difference Result 794 states and 2047 transitions. [2021-03-10 21:49:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:49:24,401 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 [2021-03-10 21:49:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:24,402 INFO L225 Difference]: With dead ends: 794 [2021-03-10 21:49:24,402 INFO L226 Difference]: Without dead ends: 793 [2021-03-10 21:49:24,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1111.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-03-10 21:49:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 661. [2021-03-10 21:49:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.796969696969697) internal successors, (1846), 660 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1846 transitions. [2021-03-10 21:49:24,409 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1846 transitions. Word has length 17 [2021-03-10 21:49:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:24,409 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1846 transitions. [2021-03-10 21:49:24,409 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) [2021-03-10 21:49:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1846 transitions. [2021-03-10 21:49:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:24,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:24,410 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:24,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:24,610 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:24,610 INFO L82 PathProgramCache]: Analyzing trace with hash -294476992, now seen corresponding path program 230 times [2021-03-10 21:49:24,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:24,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790397396] [2021-03-10 21:49:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:24,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790397396] [2021-03-10 21:49:24,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150847522] [2021-03-10 21:49:24,872 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 [2021-03-10 21:49:24,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:24,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:25,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:25,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,348 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 15 treesize of output 11 [2021-03-10 21:49:25,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:25,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:25,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:25,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:25,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:25,485 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:25,486 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:25,487 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:25,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:25,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:25,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:25,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:25,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559272950] [2021-03-10 21:49:25,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:25,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:25,718 INFO L87 Difference]: Start difference. First operand 661 states and 1846 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) [2021-03-10 21:49:26,744 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:49:27,065 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:49:27,312 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:49:27,530 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:28,344 INFO L93 Difference]: Finished difference Result 795 states and 2056 transitions. [2021-03-10 21:49:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:49:28,346 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 [2021-03-10 21:49:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:28,348 INFO L225 Difference]: With dead ends: 795 [2021-03-10 21:49:28,348 INFO L226 Difference]: Without dead ends: 787 [2021-03-10 21:49:28,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2237.2ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:49:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-03-10 21:49:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 667. [2021-03-10 21:49:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.8003003003003) internal successors, (1865), 666 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1865 transitions. [2021-03-10 21:49:28,355 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1865 transitions. Word has length 17 [2021-03-10 21:49:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:28,355 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1865 transitions. [2021-03-10 21:49:28,355 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) [2021-03-10 21:49:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1865 transitions. [2021-03-10 21:49:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:28,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:28,356 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:28,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1733 [2021-03-10 21:49:28,557 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1423866714, now seen corresponding path program 231 times [2021-03-10 21:49:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:28,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70845709] [2021-03-10 21:49:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:28,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70845709] [2021-03-10 21:49:28,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508569344] [2021-03-10 21:49:28,835 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 [2021-03-10 21:49:28,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:49:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:29,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:29,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,281 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 [2021-03-10 21:49:29,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:29,291 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 17 treesize of output 13 [2021-03-10 21:49:29,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:29,412 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:29,414 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:29,414 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:29,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:29,416 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:29,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:29,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:29,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189962686] [2021-03-10 21:49:29,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:29,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:29,597 INFO L87 Difference]: Start difference. First operand 667 states and 1865 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) [2021-03-10 21:49:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:31,418 INFO L93 Difference]: Finished difference Result 770 states and 2024 transitions. [2021-03-10 21:49:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:49:31,425 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 [2021-03-10 21:49:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:31,426 INFO L225 Difference]: With dead ends: 770 [2021-03-10 21:49:31,426 INFO L226 Difference]: Without dead ends: 770 [2021-03-10 21:49:31,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1439.5ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:49:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-03-10 21:49:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 659. [2021-03-10 21:49:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7857142857142856) internal successors, (1833), 658 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1833 transitions. [2021-03-10 21:49:31,432 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1833 transitions. Word has length 17 [2021-03-10 21:49:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:31,432 INFO L480 AbstractCegarLoop]: Abstraction has 659 states and 1833 transitions. [2021-03-10 21:49:31,433 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) [2021-03-10 21:49:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1833 transitions. [2021-03-10 21:49:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:31,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:31,433 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:31,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:31,635 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash -286746594, now seen corresponding path program 232 times [2021-03-10 21:49:31,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:31,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323489655] [2021-03-10 21:49:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:31,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323489655] [2021-03-10 21:49:31,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737659866] [2021-03-10 21:49:31,813 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 [2021-03-10 21:49:31,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:31,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:32,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:32,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:32,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:32,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:32,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:32,454 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:49:32,454 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:32,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:32,457 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:49:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:32,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:32,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:32,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100901135] [2021-03-10 21:49:32,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:32,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:32,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:32,538 INFO L87 Difference]: Start difference. First operand 659 states and 1833 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) [2021-03-10 21:49:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:34,625 INFO L93 Difference]: Finished difference Result 800 states and 2079 transitions. [2021-03-10 21:49:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:49:34,628 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 [2021-03-10 21:49:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:34,629 INFO L225 Difference]: With dead ends: 800 [2021-03-10 21:49:34,629 INFO L226 Difference]: Without dead ends: 800 [2021-03-10 21:49:34,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1516.4ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:49:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-03-10 21:49:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 655. [2021-03-10 21:49:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.7813455657492354) internal successors, (1819), 654 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1819 transitions. [2021-03-10 21:49:34,636 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1819 transitions. Word has length 17 [2021-03-10 21:49:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:34,636 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 1819 transitions. [2021-03-10 21:49:34,636 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) [2021-03-10 21:49:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1819 transitions. [2021-03-10 21:49:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:34,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:34,637 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:34,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1742 [2021-03-10 21:49:34,837 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:34,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1776151590, now seen corresponding path program 233 times [2021-03-10 21:49:34,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:34,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711916507] [2021-03-10 21:49:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711916507] [2021-03-10 21:49:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578923743] [2021-03-10 21:49:35,080 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 [2021-03-10 21:49:35,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:49:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:35,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:35,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:35,595 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 15 treesize of output 11 [2021-03-10 21:49:35,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:35,670 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:49:35,670 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:35,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:35,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:49:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:35,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:35,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:35,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491120531] [2021-03-10 21:49:35,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:35,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:35,759 INFO L87 Difference]: Start difference. First operand 655 states and 1819 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) [2021-03-10 21:49:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:36,778 INFO L93 Difference]: Finished difference Result 757 states and 1989 transitions. [2021-03-10 21:49:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:49:36,781 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 [2021-03-10 21:49:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:36,782 INFO L225 Difference]: With dead ends: 757 [2021-03-10 21:49:36,782 INFO L226 Difference]: Without dead ends: 757 [2021-03-10 21:49:36,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-03-10 21:49:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 658. [2021-03-10 21:49:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.78234398782344) internal successors, (1828), 657 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1828 transitions. [2021-03-10 21:49:36,789 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1828 transitions. Word has length 17 [2021-03-10 21:49:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:36,789 INFO L480 AbstractCegarLoop]: Abstraction has 658 states and 1828 transitions. [2021-03-10 21:49:36,789 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) [2021-03-10 21:49:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1828 transitions. [2021-03-10 21:49:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:36,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:36,790 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:37,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1745,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:37,005 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1799298558, now seen corresponding path program 234 times [2021-03-10 21:49:37,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:37,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189482271] [2021-03-10 21:49:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:37,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189482271] [2021-03-10 21:49:37,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639418133] [2021-03-10 21:49:37,297 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 [2021-03-10 21:49:37,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:37,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:37,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:37,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:37,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:37,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:37,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,772 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 16 treesize of output 12 [2021-03-10 21:49:37,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:37,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:37,783 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 17 treesize of output 13 [2021-03-10 21:49:37,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:37,915 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:37,916 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:37,916 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:37,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:37,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:38,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:38,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580939202] [2021-03-10 21:49:38,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:38,157 INFO L87 Difference]: Start difference. First operand 658 states and 1828 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) [2021-03-10 21:49:39,087 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:39,254 INFO L93 Difference]: Finished difference Result 717 states and 1918 transitions. [2021-03-10 21:49:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:49:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:39,258 INFO L225 Difference]: With dead ends: 717 [2021-03-10 21:49:39,258 INFO L226 Difference]: Without dead ends: 713 [2021-03-10 21:49:39,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1416.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-03-10 21:49:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 655. [2021-03-10 21:49:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.776758409785933) internal successors, (1816), 654 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1816 transitions. [2021-03-10 21:49:39,265 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1816 transitions. Word has length 17 [2021-03-10 21:49:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:39,265 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 1816 transitions. [2021-03-10 21:49:39,265 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) [2021-03-10 21:49:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1816 transitions. [2021-03-10 21:49:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:39,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:39,266 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:39,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:39,466 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash -766621404, now seen corresponding path program 235 times [2021-03-10 21:49:39,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:39,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556300882] [2021-03-10 21:49:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556300882] [2021-03-10 21:49:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092756663] [2021-03-10 21:49:39,779 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 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 [2021-03-10 21:49:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:40,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,422 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 [2021-03-10 21:49:40,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,433 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 [2021-03-10 21:49:40,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,444 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 [2021-03-10 21:49:40,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,455 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 [2021-03-10 21:49:40,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,470 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 17 treesize of output 13 [2021-03-10 21:49:40,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,482 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 8 treesize of output 6 [2021-03-10 21:49:40,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,613 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:49:40,614 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:49:40,615 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:40,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:49:40,618 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:49:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:40,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:40,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:40,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591233528] [2021-03-10 21:49:40,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:40,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:40,727 INFO L87 Difference]: Start difference. First operand 655 states and 1816 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) [2021-03-10 21:49:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,008 INFO L93 Difference]: Finished difference Result 700 states and 1881 transitions. [2021-03-10 21:49:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:49:42,011 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 [2021-03-10 21:49:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,012 INFO L225 Difference]: With dead ends: 700 [2021-03-10 21:49:42,012 INFO L226 Difference]: Without dead ends: 692 [2021-03-10 21:49:42,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1490.0ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:49:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-03-10 21:49:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 653. [2021-03-10 21:49:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7699386503067487) internal successors, (1806), 652 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1806 transitions. [2021-03-10 21:49:42,019 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1806 transitions. Word has length 17 [2021-03-10 21:49:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,020 INFO L480 AbstractCegarLoop]: Abstraction has 653 states and 1806 transitions. [2021-03-10 21:49:42,020 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) [2021-03-10 21:49:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1806 transitions. [2021-03-10 21:49:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:42,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,020 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-03-10 21:49:42,221 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1294238398, now seen corresponding path program 236 times [2021-03-10 21:49:42,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815158422] [2021-03-10 21:49:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:42,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815158422] [2021-03-10 21:49:42,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258121189] [2021-03-10 21:49:42,446 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 [2021-03-10 21:49:42,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:42,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:43,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:43,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:43,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:49:43,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:49:43,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:43,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:49:43,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:43,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:43,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:43,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:43,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:49:43,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:43,215 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:49:43,216 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:49:43,216 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:43,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:49:43,220 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:49:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:43,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:43,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:49:43,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750322181] [2021-03-10 21:49:43,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:43,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:43,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:43,339 INFO L87 Difference]: Start difference. First operand 653 states and 1806 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) [2021-03-10 21:49:44,012 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 21:49:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:44,516 INFO L93 Difference]: Finished difference Result 686 states and 1851 transitions. [2021-03-10 21:49:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:49:44,519 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 [2021-03-10 21:49:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:44,520 INFO L225 Difference]: With dead ends: 686 [2021-03-10 21:49:44,520 INFO L226 Difference]: Without dead ends: 674 [2021-03-10 21:49:44,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1295.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-03-10 21:49:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 652. [2021-03-10 21:49:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.763440860215054) internal successors, (1799), 651 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1799 transitions. [2021-03-10 21:49:44,526 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1799 transitions. Word has length 17 [2021-03-10 21:49:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:44,526 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1799 transitions. [2021-03-10 21:49:44,526 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) [2021-03-10 21:49:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1799 transitions. [2021-03-10 21:49:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:44,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:44,527 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:44,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-03-10 21:49:44,731 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -902314216, now seen corresponding path program 237 times [2021-03-10 21:49:44,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:44,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055262128] [2021-03-10 21:49:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:45,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055262128] [2021-03-10 21:49:45,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736507305] [2021-03-10 21:49:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:49:45,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:49:45,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:45,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:45,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:45,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:45,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:45,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,705 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:45,706 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:45,706 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:45,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:45,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:45,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:45,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:49:45,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169902420] [2021-03-10 21:49:45,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:49:45,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:49:45,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:45,894 INFO L87 Difference]: Start difference. First operand 652 states and 1799 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) [2021-03-10 21:49:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:47,031 INFO L93 Difference]: Finished difference Result 773 states and 2016 transitions. [2021-03-10 21:49:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:49:47,034 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 [2021-03-10 21:49:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:47,035 INFO L225 Difference]: With dead ends: 773 [2021-03-10 21:49:47,035 INFO L226 Difference]: Without dead ends: 773 [2021-03-10 21:49:47,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1214.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-03-10 21:49:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 666. [2021-03-10 21:49:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.77593984962406) internal successors, (1846), 665 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1846 transitions. [2021-03-10 21:49:47,042 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1846 transitions. Word has length 17 [2021-03-10 21:49:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:47,042 INFO L480 AbstractCegarLoop]: Abstraction has 666 states and 1846 transitions. [2021-03-10 21:49:47,042 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) [2021-03-10 21:49:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1846 transitions. [2021-03-10 21:49:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:47,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:47,043 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:47,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:47,244 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -100697988, now seen corresponding path program 238 times [2021-03-10 21:49:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:47,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777678002] [2021-03-10 21:49:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:47,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777678002] [2021-03-10 21:49:47,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050012555] [2021-03-10 21:49:47,565 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 [2021-03-10 21:49:47,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:47,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:48,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,029 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 16 treesize of output 12 [2021-03-10 21:49:48,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:48,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:48,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,060 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 17 treesize of output 13 [2021-03-10 21:49:48,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,174 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:48,175 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:48,175 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:48,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:48,177 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:48,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:48,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:49:48,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390769080] [2021-03-10 21:49:48,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:49:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:49:48,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:48,431 INFO L87 Difference]: Start difference. First operand 666 states and 1846 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) [2021-03-10 21:49:49,165 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:49:49,571 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:49:49,956 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:49:50,490 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:49:50,836 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:49:51,398 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:49:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:51,571 INFO L93 Difference]: Finished difference Result 792 states and 2043 transitions. [2021-03-10 21:49:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:49:51,572 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 [2021-03-10 21:49:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:51,573 INFO L225 Difference]: With dead ends: 792 [2021-03-10 21:49:51,573 INFO L226 Difference]: Without dead ends: 782 [2021-03-10 21:49:51,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 3087.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:49:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-03-10 21:49:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 674. [2021-03-10 21:49:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 2.777117384843982) internal successors, (1869), 673 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1869 transitions. [2021-03-10 21:49:51,580 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1869 transitions. Word has length 17 [2021-03-10 21:49:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:51,580 INFO L480 AbstractCegarLoop]: Abstraction has 674 states and 1869 transitions. [2021-03-10 21:49:51,580 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) [2021-03-10 21:49:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1869 transitions. [2021-03-10 21:49:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:51,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:51,581 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:51,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-03-10 21:49:51,781 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:51,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1617645718, now seen corresponding path program 239 times [2021-03-10 21:49:51,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:51,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610046485] [2021-03-10 21:49:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:52,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610046485] [2021-03-10 21:49:52,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038528381] [2021-03-10 21:49:52,155 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 [2021-03-10 21:49:52,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:49:52,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:52,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:52,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:52,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:52,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,694 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 16 treesize of output 12 [2021-03-10 21:49:52,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:52,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,829 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:49:52,830 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:49:52,830 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:52,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:52,833 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:49:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:53,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:49:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960546906] [2021-03-10 21:49:53,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:49:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:49:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:53,024 INFO L87 Difference]: Start difference. First operand 674 states and 1869 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) [2021-03-10 21:49:53,833 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:49:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:55,086 INFO L93 Difference]: Finished difference Result 769 states and 2018 transitions. [2021-03-10 21:49:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:49:55,089 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 [2021-03-10 21:49:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:55,090 INFO L225 Difference]: With dead ends: 769 [2021-03-10 21:49:55,090 INFO L226 Difference]: Without dead ends: 769 [2021-03-10 21:49:55,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1990.6ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:49:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-03-10 21:49:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 670. [2021-03-10 21:49:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.7698056801195814) internal successors, (1853), 669 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1853 transitions. [2021-03-10 21:49:55,098 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1853 transitions. Word has length 17 [2021-03-10 21:49:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:55,098 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1853 transitions. [2021-03-10 21:49:55,098 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) [2021-03-10 21:49:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1853 transitions. [2021-03-10 21:49:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:55,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:55,099 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:55,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1777,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:55,300 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -92967590, now seen corresponding path program 240 times [2021-03-10 21:49:55,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:55,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260405815] [2021-03-10 21:49:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:55,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260405815] [2021-03-10 21:49:55,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129457091] [2021-03-10 21:49:55,609 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 [2021-03-10 21:49:55,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:49:55,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:55,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:55,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:56,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:56,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,298 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:49:56,299 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:56,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:49:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:56,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:56,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:49:56,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548991999] [2021-03-10 21:49:56,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:49:56,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:56,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:49:56,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:56,377 INFO L87 Difference]: Start difference. First operand 670 states and 1853 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) [2021-03-10 21:49:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:58,878 INFO L93 Difference]: Finished difference Result 838 states and 2147 transitions. [2021-03-10 21:49:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:49:58,881 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 [2021-03-10 21:49:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:58,882 INFO L225 Difference]: With dead ends: 838 [2021-03-10 21:49:58,882 INFO L226 Difference]: Without dead ends: 838 [2021-03-10 21:49:58,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2184.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:49:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-03-10 21:49:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 672. [2021-03-10 21:49:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 2.773472429210134) internal successors, (1861), 671 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1861 transitions. [2021-03-10 21:49:58,890 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1861 transitions. Word has length 17 [2021-03-10 21:49:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:58,890 INFO L480 AbstractCegarLoop]: Abstraction has 672 states and 1861 transitions. [2021-03-10 21:49:58,890 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) [2021-03-10 21:49:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1861 transitions. [2021-03-10 21:49:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:58,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:58,891 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:59,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-03-10 21:49:59,091 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1582372586, now seen corresponding path program 241 times [2021-03-10 21:49:59,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:59,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448336362] [2021-03-10 21:49:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:59,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448336362] [2021-03-10 21:49:59,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685195163] [2021-03-10 21:49:59,353 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 [2021-03-10 21:49:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:59,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:49:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:59,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:49:59,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,889 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 15 treesize of output 11 [2021-03-10 21:49:59,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,963 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:49:59,964 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:59,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:00,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:00,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:50:00,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321581955] [2021-03-10 21:50:00,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:50:00,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:50:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:00,042 INFO L87 Difference]: Start difference. First operand 672 states and 1861 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) [2021-03-10 21:50:03,386 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:50:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:03,893 INFO L93 Difference]: Finished difference Result 829 states and 2147 transitions. [2021-03-10 21:50:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:50:03,897 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 [2021-03-10 21:50:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:03,898 INFO L225 Difference]: With dead ends: 829 [2021-03-10 21:50:03,898 INFO L226 Difference]: Without dead ends: 829 [2021-03-10 21:50:03,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2902.6ms TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:50:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-03-10 21:50:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 664. [2021-03-10 21:50:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.7631975867269984) internal successors, (1832), 663 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) [2021-03-10 21:50:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1832 transitions. [2021-03-10 21:50:03,906 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1832 transitions. Word has length 17 [2021-03-10 21:50:03,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:03,906 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 1832 transitions. [2021-03-10 21:50:03,906 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) [2021-03-10 21:50:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1832 transitions. [2021-03-10 21:50:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:03,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:03,907 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:04,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1784,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:04,111 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash -509287206, now seen corresponding path program 242 times [2021-03-10 21:50:04,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:04,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052857215] [2021-03-10 21:50:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:04,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052857215] [2021-03-10 21:50:04,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724607192] [2021-03-10 21:50:04,418 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 [2021-03-10 21:50:04,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:05,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,075 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 [2021-03-10 21:50:05,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,087 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 [2021-03-10 21:50:05,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,168 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:05,169 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:05,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:05,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:05,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:50:05,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691349888] [2021-03-10 21:50:05,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:50:05,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:50:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:05,267 INFO L87 Difference]: Start difference. First operand 664 states and 1832 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) [2021-03-10 21:50:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:06,017 INFO L93 Difference]: Finished difference Result 719 states and 1935 transitions. [2021-03-10 21:50:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:50:06,020 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 [2021-03-10 21:50:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:06,021 INFO L225 Difference]: With dead ends: 719 [2021-03-10 21:50:06,022 INFO L226 Difference]: Without dead ends: 719 [2021-03-10 21:50:06,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-03-10 21:50:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 668. [2021-03-10 21:50:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.7661169415292353) internal successors, (1845), 667 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1845 transitions. [2021-03-10 21:50:06,029 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1845 transitions. Word has length 17 [2021-03-10 21:50:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:06,029 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1845 transitions. [2021-03-10 21:50:06,029 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) [2021-03-10 21:50:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1845 transitions. [2021-03-10 21:50:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:06,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:06,030 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:06,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1787 [2021-03-10 21:50:06,230 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash 879028154, now seen corresponding path program 243 times [2021-03-10 21:50:06,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:06,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447948498] [2021-03-10 21:50:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:06,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447948498] [2021-03-10 21:50:06,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011602339] [2021-03-10 21:50:06,517 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 [2021-03-10 21:50:06,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:06,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:06,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:06,912 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 [2021-03-10 21:50:06,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:06,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:06,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:06,980 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-03-10 21:50:06,980 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:06,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:06,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-03-10 21:50:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:07,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:07,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:50:07,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080764008] [2021-03-10 21:50:07,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:07,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:07,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:07,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:07,059 INFO L87 Difference]: Start difference. First operand 668 states and 1845 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) [2021-03-10 21:50:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:07,784 INFO L93 Difference]: Finished difference Result 880 states and 2377 transitions. [2021-03-10 21:50:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:07,787 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 [2021-03-10 21:50:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:07,788 INFO L225 Difference]: With dead ends: 880 [2021-03-10 21:50:07,788 INFO L226 Difference]: Without dead ends: 880 [2021-03-10 21:50:07,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 668.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-03-10 21:50:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 667. [2021-03-10 21:50:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7687687687687688) internal successors, (1844), 666 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1844 transitions. [2021-03-10 21:50:07,796 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1844 transitions. Word has length 17 [2021-03-10 21:50:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:07,796 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1844 transitions. [2021-03-10 21:50:07,796 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) [2021-03-10 21:50:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1844 transitions. [2021-03-10 21:50:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:07,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:07,797 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:07,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:07,997 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 744702690, now seen corresponding path program 244 times [2021-03-10 21:50:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359600786] [2021-03-10 21:50:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359600786] [2021-03-10 21:50:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427738989] [2021-03-10 21:50:08,271 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 [2021-03-10 21:50:08,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:08,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:08,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,723 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 17 treesize of output 13 [2021-03-10 21:50:08,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:50:08,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,740 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 7 treesize of output 5 [2021-03-10 21:50:08,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,749 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 [2021-03-10 21:50:08,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:08,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,861 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-03-10 21:50:08,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:08,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:08,864 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-03-10 21:50:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:08,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:08,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:50:08,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162566505] [2021-03-10 21:50:08,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:08,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:08,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:08,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:08,983 INFO L87 Difference]: Start difference. First operand 667 states and 1844 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) [2021-03-10 21:50:10,185 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:50:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:10,517 INFO L93 Difference]: Finished difference Result 876 states and 2364 transitions. [2021-03-10 21:50:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:10,520 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 [2021-03-10 21:50:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:10,521 INFO L225 Difference]: With dead ends: 876 [2021-03-10 21:50:10,522 INFO L226 Difference]: Without dead ends: 871 [2021-03-10 21:50:10,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1559.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:50:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-03-10 21:50:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 667. [2021-03-10 21:50:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7672672672672673) internal successors, (1843), 666 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1843 transitions. [2021-03-10 21:50:10,529 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1843 transitions. Word has length 17 [2021-03-10 21:50:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:10,529 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1843 transitions. [2021-03-10 21:50:10,529 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) [2021-03-10 21:50:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1843 transitions. [2021-03-10 21:50:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:10,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:10,530 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:10,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1792 [2021-03-10 21:50:10,730 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -773925220, now seen corresponding path program 245 times [2021-03-10 21:50:10,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:10,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314961528] [2021-03-10 21:50:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314961528] [2021-03-10 21:50:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920278313] [2021-03-10 21:50:11,023 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 [2021-03-10 21:50:11,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:11,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,550 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 [2021-03-10 21:50:11,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,561 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 [2021-03-10 21:50:11,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,646 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:11,646 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:11,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,648 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:11,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:11,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:11,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808535570] [2021-03-10 21:50:11,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:11,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:11,730 INFO L87 Difference]: Start difference. First operand 667 states and 1843 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) [2021-03-10 21:50:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:12,427 INFO L93 Difference]: Finished difference Result 881 states and 2379 transitions. [2021-03-10 21:50:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:12,429 INFO L225 Difference]: With dead ends: 881 [2021-03-10 21:50:12,429 INFO L226 Difference]: Without dead ends: 881 [2021-03-10 21:50:12,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-03-10 21:50:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 668. [2021-03-10 21:50:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.767616191904048) internal successors, (1846), 667 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1846 transitions. [2021-03-10 21:50:12,438 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1846 transitions. Word has length 17 [2021-03-10 21:50:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:12,438 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1846 transitions. [2021-03-10 21:50:12,439 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) [2021-03-10 21:50:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1846 transitions. [2021-03-10 21:50:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:12,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:12,439 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:12,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1799 [2021-03-10 21:50:12,654 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash 156957368, now seen corresponding path program 246 times [2021-03-10 21:50:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:12,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887891936] [2021-03-10 21:50:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:13,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887891936] [2021-03-10 21:50:13,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99322709] [2021-03-10 21:50:13,009 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 [2021-03-10 21:50:13,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:13,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:13,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:13,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,746 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 [2021-03-10 21:50:13,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:13,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:13,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,778 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 [2021-03-10 21:50:13,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:13,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,937 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:50:13,938 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:50:13,939 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:13,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:13,942 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:50:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:14,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:14,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:14,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148294229] [2021-03-10 21:50:14,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:14,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:14,070 INFO L87 Difference]: Start difference. First operand 668 states and 1846 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) [2021-03-10 21:50:14,799 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 21:50:15,219 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:50:15,450 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:50:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:15,822 INFO L93 Difference]: Finished difference Result 878 states and 2368 transitions. [2021-03-10 21:50:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:50:15,824 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 [2021-03-10 21:50:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:15,826 INFO L225 Difference]: With dead ends: 878 [2021-03-10 21:50:15,826 INFO L226 Difference]: Without dead ends: 874 [2021-03-10 21:50:15,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2004.8ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:50:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-03-10 21:50:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 668. [2021-03-10 21:50:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.7661169415292353) internal successors, (1845), 667 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1845 transitions. [2021-03-10 21:50:15,833 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1845 transitions. Word has length 17 [2021-03-10 21:50:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:15,833 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1845 transitions. [2021-03-10 21:50:15,833 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) [2021-03-10 21:50:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1845 transitions. [2021-03-10 21:50:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:15,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:15,834 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:16,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1802,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:16,035 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1934947334, now seen corresponding path program 247 times [2021-03-10 21:50:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:16,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628367331] [2021-03-10 21:50:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:16,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628367331] [2021-03-10 21:50:16,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538339357] [2021-03-10 21:50:16,378 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 [2021-03-10 21:50:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:16,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:16,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:16,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,063 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:17,064 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:17,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:17,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:17,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:17,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714660527] [2021-03-10 21:50:17,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:17,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:17,152 INFO L87 Difference]: Start difference. First operand 668 states and 1845 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) [2021-03-10 21:50:18,679 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:50:19,231 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:50:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:19,320 INFO L93 Difference]: Finished difference Result 906 states and 2429 transitions. [2021-03-10 21:50:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:50:19,323 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 [2021-03-10 21:50:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:19,325 INFO L225 Difference]: With dead ends: 906 [2021-03-10 21:50:19,325 INFO L226 Difference]: Without dead ends: 906 [2021-03-10 21:50:19,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1792.6ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:50:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-03-10 21:50:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 671. [2021-03-10 21:50:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.7671641791044777) internal successors, (1854), 670 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1854 transitions. [2021-03-10 21:50:19,332 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1854 transitions. Word has length 17 [2021-03-10 21:50:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:19,333 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1854 transitions. [2021-03-10 21:50:19,333 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) [2021-03-10 21:50:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1854 transitions. [2021-03-10 21:50:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:19,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:19,333 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:19,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1809 [2021-03-10 21:50:19,534 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash -380898210, now seen corresponding path program 248 times [2021-03-10 21:50:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:19,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282471612] [2021-03-10 21:50:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:19,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282471612] [2021-03-10 21:50:19,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333337605] [2021-03-10 21:50:19,887 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 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 [2021-03-10 21:50:19,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:19,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:20,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,553 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 [2021-03-10 21:50:20,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,564 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 [2021-03-10 21:50:20,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,575 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 8 treesize of output 6 [2021-03-10 21:50:20,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:20,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:20,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:20,618 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,751 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:50:20,752 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:50:20,752 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:20,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:20,756 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:50:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:20,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:20,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090920573] [2021-03-10 21:50:20,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:20,890 INFO L87 Difference]: Start difference. First operand 671 states and 1854 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) [2021-03-10 21:50:21,709 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-03-10 21:50:22,087 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:50:22,529 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:50:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:22,816 INFO L93 Difference]: Finished difference Result 887 states and 2386 transitions. [2021-03-10 21:50:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:50:22,820 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 [2021-03-10 21:50:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:22,821 INFO L225 Difference]: With dead ends: 887 [2021-03-10 21:50:22,821 INFO L226 Difference]: Without dead ends: 884 [2021-03-10 21:50:22,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1911.6ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:50:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-03-10 21:50:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 673. [2021-03-10 21:50:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 2.7663690476190474) internal successors, (1859), 672 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1859 transitions. [2021-03-10 21:50:22,829 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1859 transitions. Word has length 17 [2021-03-10 21:50:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:22,829 INFO L480 AbstractCegarLoop]: Abstraction has 673 states and 1859 transitions. [2021-03-10 21:50:22,829 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) [2021-03-10 21:50:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1859 transitions. [2021-03-10 21:50:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:22,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:22,830 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:23,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1812,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:23,031 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1695304996, now seen corresponding path program 249 times [2021-03-10 21:50:23,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:23,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147805721] [2021-03-10 21:50:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147805721] [2021-03-10 21:50:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719655729] [2021-03-10 21:50:23,422 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 [2021-03-10 21:50:23,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:50:23,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:23,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:23,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,064 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 16 treesize of output 12 [2021-03-10 21:50:24,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,075 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 [2021-03-10 21:50:24,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,163 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:24,163 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:24,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:24,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:24,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:24,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141284018] [2021-03-10 21:50:24,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:24,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:24,270 INFO L87 Difference]: Start difference. First operand 673 states and 1859 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) [2021-03-10 21:50:25,582 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:50:26,088 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:50:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:26,996 INFO L93 Difference]: Finished difference Result 979 states and 2557 transitions. [2021-03-10 21:50:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:50:27,000 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 [2021-03-10 21:50:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:27,001 INFO L225 Difference]: With dead ends: 979 [2021-03-10 21:50:27,001 INFO L226 Difference]: Without dead ends: 979 [2021-03-10 21:50:27,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2223.2ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:50:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-03-10 21:50:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 684. [2021-03-10 21:50:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.7774524158125917) internal successors, (1897), 683 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1897 transitions. [2021-03-10 21:50:27,009 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1897 transitions. Word has length 17 [2021-03-10 21:50:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:27,009 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1897 transitions. [2021-03-10 21:50:27,009 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) [2021-03-10 21:50:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1897 transitions. [2021-03-10 21:50:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:27,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:27,010 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:27,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1819,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:27,210 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1679961592, now seen corresponding path program 250 times [2021-03-10 21:50:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:27,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316159385] [2021-03-10 21:50:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:27,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316159385] [2021-03-10 21:50:27,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830804963] [2021-03-10 21:50:27,572 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 [2021-03-10 21:50:27,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:27,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:27,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:28,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,251 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 [2021-03-10 21:50:28,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:28,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:28,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,285 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 [2021-03-10 21:50:28,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,299 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 17 treesize of output 13 [2021-03-10 21:50:28,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,312 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 [2021-03-10 21:50:28,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,450 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:50:28,451 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:50:28,452 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:28,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:28,455 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:50:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:28,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:28,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:28,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248040607] [2021-03-10 21:50:28,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:28,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:28,591 INFO L87 Difference]: Start difference. First operand 684 states and 1897 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) [2021-03-10 21:50:29,392 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 17 [2021-03-10 21:50:30,000 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:50:30,321 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:50:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:30,662 INFO L93 Difference]: Finished difference Result 901 states and 2430 transitions. [2021-03-10 21:50:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:50:30,665 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 [2021-03-10 21:50:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:30,666 INFO L225 Difference]: With dead ends: 901 [2021-03-10 21:50:30,666 INFO L226 Difference]: Without dead ends: 899 [2021-03-10 21:50:30,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1946.4ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:50:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-03-10 21:50:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 686. [2021-03-10 21:50:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 2.7766423357664234) internal successors, (1902), 685 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) [2021-03-10 21:50:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1902 transitions. [2021-03-10 21:50:30,675 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1902 transitions. Word has length 17 [2021-03-10 21:50:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:30,675 INFO L480 AbstractCegarLoop]: Abstraction has 686 states and 1902 transitions. [2021-03-10 21:50:30,675 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) [2021-03-10 21:50:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1902 transitions. [2021-03-10 21:50:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:30,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:30,676 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:30,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1822,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:30,876 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1687574598, now seen corresponding path program 251 times [2021-03-10 21:50:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:30,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367165977] [2021-03-10 21:50:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:31,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367165977] [2021-03-10 21:50:31,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095429208] [2021-03-10 21:50:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:31,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:31,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,568 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 [2021-03-10 21:50:31,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,580 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 17 treesize of output 13 [2021-03-10 21:50:31,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:31,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,606 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 [2021-03-10 21:50:31,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,742 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:50:31,744 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:50:31,744 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:31,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:31,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:50:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:31,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:31,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:31,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447565258] [2021-03-10 21:50:31,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:31,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:31,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:31,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:31,979 INFO L87 Difference]: Start difference. First operand 686 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) [2021-03-10 21:50:32,914 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 21:50:33,093 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:50:33,799 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 21:50:34,242 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 21:50:34,452 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:50:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:34,731 INFO L93 Difference]: Finished difference Result 990 states and 2572 transitions. [2021-03-10 21:50:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:50:34,734 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 [2021-03-10 21:50:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:34,735 INFO L225 Difference]: With dead ends: 990 [2021-03-10 21:50:34,735 INFO L226 Difference]: Without dead ends: 990 [2021-03-10 21:50:34,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2109.3ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:50:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-03-10 21:50:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 693. [2021-03-10 21:50:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 2.7846820809248554) internal successors, (1927), 692 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1927 transitions. [2021-03-10 21:50:34,744 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1927 transitions. Word has length 17 [2021-03-10 21:50:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:34,744 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 1927 transitions. [2021-03-10 21:50:34,744 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) [2021-03-10 21:50:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1927 transitions. [2021-03-10 21:50:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:34,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:34,745 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:34,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:34,945 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash -885958370, now seen corresponding path program 252 times [2021-03-10 21:50:34,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:34,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220729665] [2021-03-10 21:50:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:35,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220729665] [2021-03-10 21:50:35,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576427782] [2021-03-10 21:50:35,344 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 [2021-03-10 21:50:35,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:35,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:35,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,843 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 17 treesize of output 13 [2021-03-10 21:50:35,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:35,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:35,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,005 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:50:36,007 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:50:36,007 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:36,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:36,009 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:50:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:36,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:36,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:36,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298212889] [2021-03-10 21:50:36,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:36,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:36,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:36,277 INFO L87 Difference]: Start difference. First operand 693 states and 1927 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) [2021-03-10 21:50:36,841 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2021-03-10 21:50:37,395 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 21:50:37,826 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 21:50:38,035 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2021-03-10 21:50:38,462 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-10 21:50:39,015 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:50:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:39,036 INFO L93 Difference]: Finished difference Result 937 states and 2499 transitions. [2021-03-10 21:50:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:50:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:39,041 INFO L225 Difference]: With dead ends: 937 [2021-03-10 21:50:39,041 INFO L226 Difference]: Without dead ends: 934 [2021-03-10 21:50:39,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2742.6ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:50:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-03-10 21:50:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 695. [2021-03-10 21:50:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.7853025936599423) internal successors, (1933), 694 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1933 transitions. [2021-03-10 21:50:39,048 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1933 transitions. Word has length 17 [2021-03-10 21:50:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:39,048 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 1933 transitions. [2021-03-10 21:50:39,048 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) [2021-03-10 21:50:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1933 transitions. [2021-03-10 21:50:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:39,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:39,049 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:39,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1833 [2021-03-10 21:50:39,251 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash 832385336, now seen corresponding path program 253 times [2021-03-10 21:50:39,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:39,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657853695] [2021-03-10 21:50:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:39,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657853695] [2021-03-10 21:50:39,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486660750] [2021-03-10 21:50:39,681 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 [2021-03-10 21:50:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:39,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:40,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,182 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 [2021-03-10 21:50:40,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:40,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,194 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 17 treesize of output 13 [2021-03-10 21:50:40,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:40,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:40,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:40,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:40,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:40,357 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:50:40,358 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:50:40,359 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:40,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:40,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:50:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:40,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:40,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:40,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540676957] [2021-03-10 21:50:40,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:40,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:40,577 INFO L87 Difference]: Start difference. First operand 695 states and 1933 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) [2021-03-10 21:50:40,851 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2021-03-10 21:50:41,100 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2021-03-10 21:50:41,749 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 21:50:41,997 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-03-10 21:50:42,278 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:50:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:42,287 INFO L93 Difference]: Finished difference Result 926 states and 2483 transitions. [2021-03-10 21:50:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:50:42,291 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 17 [2021-03-10 21:50:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:42,292 INFO L225 Difference]: With dead ends: 926 [2021-03-10 21:50:42,292 INFO L226 Difference]: Without dead ends: 926 [2021-03-10 21:50:42,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1810.2ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-03-10 21:50:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 693. [2021-03-10 21:50:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 2.781791907514451) internal successors, (1925), 692 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1925 transitions. [2021-03-10 21:50:42,301 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1925 transitions. Word has length 17 [2021-03-10 21:50:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:42,301 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 1925 transitions. [2021-03-10 21:50:42,301 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) [2021-03-10 21:50:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1925 transitions. [2021-03-10 21:50:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:42,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:42,302 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:42,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:42,502 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 111873060, now seen corresponding path program 254 times [2021-03-10 21:50:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:42,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125762749] [2021-03-10 21:50:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:42,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125762749] [2021-03-10 21:50:42,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366176755] [2021-03-10 21:50:42,829 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 [2021-03-10 21:50:42,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:43,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:43,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:43,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,395 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:43,396 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:43,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:43,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:43,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:43,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31527771] [2021-03-10 21:50:43,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:43,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:43,437 INFO L87 Difference]: Start difference. First operand 693 states and 1925 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) [2021-03-10 21:50:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:44,380 INFO L93 Difference]: Finished difference Result 789 states and 2142 transitions. [2021-03-10 21:50:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:44,384 INFO L225 Difference]: With dead ends: 789 [2021-03-10 21:50:44,384 INFO L226 Difference]: Without dead ends: 789 [2021-03-10 21:50:44,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 651.8ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-03-10 21:50:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 699. [2021-03-10 21:50:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.78080229226361) internal successors, (1941), 698 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1941 transitions. [2021-03-10 21:50:44,391 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1941 transitions. Word has length 17 [2021-03-10 21:50:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:44,391 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1941 transitions. [2021-03-10 21:50:44,391 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) [2021-03-10 21:50:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1941 transitions. [2021-03-10 21:50:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:44,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:44,392 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:44,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1843 [2021-03-10 21:50:44,592 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:44,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1042755648, now seen corresponding path program 255 times [2021-03-10 21:50:44,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:44,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526480462] [2021-03-10 21:50:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:44,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526480462] [2021-03-10 21:50:44,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238739828] [2021-03-10 21:50:44,904 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 [2021-03-10 21:50:44,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:45,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,578 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 [2021-03-10 21:50:45,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:45,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:45,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:45,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:45,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,635 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 [2021-03-10 21:50:45,640 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,769 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:50:45,771 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:50:45,771 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:45,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:45,775 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:50:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:45,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:45,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:45,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683447048] [2021-03-10 21:50:45,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:45,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:45,906 INFO L87 Difference]: Start difference. First operand 699 states and 1941 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) [2021-03-10 21:50:46,510 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 21:50:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:47,260 INFO L93 Difference]: Finished difference Result 780 states and 2116 transitions. [2021-03-10 21:50:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:50:47,263 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 [2021-03-10 21:50:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:47,264 INFO L225 Difference]: With dead ends: 780 [2021-03-10 21:50:47,264 INFO L226 Difference]: Without dead ends: 776 [2021-03-10 21:50:47,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1440.2ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-03-10 21:50:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 701. [2021-03-10 21:50:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.7742857142857145) internal successors, (1942), 700 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1942 transitions. [2021-03-10 21:50:47,272 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1942 transitions. Word has length 17 [2021-03-10 21:50:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:47,272 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 1942 transitions. [2021-03-10 21:50:47,272 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) [2021-03-10 21:50:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1942 transitions. [2021-03-10 21:50:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:47,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:47,272 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:47,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:47,473 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1049149054, now seen corresponding path program 256 times [2021-03-10 21:50:47,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:47,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221877583] [2021-03-10 21:50:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221877583] [2021-03-10 21:50:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182280099] [2021-03-10 21:50:47,785 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 [2021-03-10 21:50:47,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:48,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,329 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 15 treesize of output 11 [2021-03-10 21:50:48,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:48,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:48,422 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:48,422 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:48,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:48,424 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:48,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:48,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:48,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780974262] [2021-03-10 21:50:48,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:48,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:48,509 INFO L87 Difference]: Start difference. First operand 701 states and 1942 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) [2021-03-10 21:50:50,073 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:50:50,641 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:50:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:50,737 INFO L93 Difference]: Finished difference Result 799 states and 2163 transitions. [2021-03-10 21:50:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:50:50,740 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 [2021-03-10 21:50:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:50,741 INFO L225 Difference]: With dead ends: 799 [2021-03-10 21:50:50,741 INFO L226 Difference]: Without dead ends: 799 [2021-03-10 21:50:50,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1740.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:50:50,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-03-10 21:50:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 698. [2021-03-10 21:50:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.781922525107604) internal successors, (1939), 697 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1939 transitions. [2021-03-10 21:50:50,749 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1939 transitions. Word has length 17 [2021-03-10 21:50:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:50,749 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1939 transitions. [2021-03-10 21:50:50,749 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) [2021-03-10 21:50:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1939 transitions. [2021-03-10 21:50:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:50,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:50,750 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:50,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1853 [2021-03-10 21:50:50,950 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:50,951 INFO L82 PathProgramCache]: Analyzing trace with hash 504900070, now seen corresponding path program 257 times [2021-03-10 21:50:50,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:50,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553886299] [2021-03-10 21:50:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553886299] [2021-03-10 21:50:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555596263] [2021-03-10 21:50:51,294 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 [2021-03-10 21:50:51,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:51,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:51,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:52,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:50:52,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:52,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:52,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:52,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:52,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:52,050 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 17 treesize of output 13 [2021-03-10 21:50:52,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:52,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,205 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:50:52,206 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:50:52,206 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:52,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:52,209 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:50:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:52,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:52,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:52,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030639430] [2021-03-10 21:50:52,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:52,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:52,271 INFO L87 Difference]: Start difference. First operand 698 states and 1939 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) [2021-03-10 21:50:52,779 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:50:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:53,258 INFO L93 Difference]: Finished difference Result 774 states and 2111 transitions. [2021-03-10 21:50:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:50:53,262 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 [2021-03-10 21:50:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:53,263 INFO L225 Difference]: With dead ends: 774 [2021-03-10 21:50:53,263 INFO L226 Difference]: Without dead ends: 771 [2021-03-10 21:50:53,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1288.4ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-03-10 21:50:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 699. [2021-03-10 21:50:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.78080229226361) internal successors, (1941), 698 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1941 transitions. [2021-03-10 21:50:53,270 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1941 transitions. Word has length 17 [2021-03-10 21:50:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:53,270 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1941 transitions. [2021-03-10 21:50:53,271 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) [2021-03-10 21:50:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1941 transitions. [2021-03-10 21:50:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:53,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:53,271 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:53,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:53,472 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash -809506716, now seen corresponding path program 258 times [2021-03-10 21:50:53,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970680520] [2021-03-10 21:50:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:53,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970680520] [2021-03-10 21:50:53,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313053096] [2021-03-10 21:50:53,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:53,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:54,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:54,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:54,387 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 [2021-03-10 21:50:54,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:54,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:54,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,493 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:50:54,493 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:54,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:50:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:54,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:54,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:54,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964713912] [2021-03-10 21:50:54,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:54,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:54,583 INFO L87 Difference]: Start difference. First operand 699 states and 1941 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) [2021-03-10 21:50:55,842 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:50:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:57,173 INFO L93 Difference]: Finished difference Result 869 states and 2286 transitions. [2021-03-10 21:50:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:50:57,176 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 [2021-03-10 21:50:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:57,177 INFO L225 Difference]: With dead ends: 869 [2021-03-10 21:50:57,177 INFO L226 Difference]: Without dead ends: 869 [2021-03-10 21:50:57,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2087.9ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:50:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-03-10 21:50:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 710. [2021-03-10 21:50:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.791255289139633) internal successors, (1979), 709 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1979 transitions. [2021-03-10 21:50:57,185 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1979 transitions. Word has length 17 [2021-03-10 21:50:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:57,185 INFO L480 AbstractCegarLoop]: Abstraction has 710 states and 1979 transitions. [2021-03-10 21:50:57,185 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) [2021-03-10 21:50:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1979 transitions. [2021-03-10 21:50:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:57,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:57,186 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:57,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-03-10 21:50:57,386 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1729207424, now seen corresponding path program 259 times [2021-03-10 21:50:57,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:57,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763806497] [2021-03-10 21:50:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:57,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763806497] [2021-03-10 21:50:57,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146860095] [2021-03-10 21:50:57,756 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 [2021-03-10 21:50:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:50:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:58,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,374 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 16 treesize of output 12 [2021-03-10 21:50:58,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:58,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:50:58,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:58,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,422 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 17 treesize of output 13 [2021-03-10 21:50:58,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:58,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,585 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:50:58,585 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:50:58,586 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:58,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:58,589 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:50:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:58,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:58,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:58,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261008349] [2021-03-10 21:50:58,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:58,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:58,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:58,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:58,717 INFO L87 Difference]: Start difference. First operand 710 states and 1979 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) [2021-03-10 21:50:59,679 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:51:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:00,362 INFO L93 Difference]: Finished difference Result 807 states and 2184 transitions. [2021-03-10 21:51:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:51:00,366 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 [2021-03-10 21:51:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:00,367 INFO L225 Difference]: With dead ends: 807 [2021-03-10 21:51:00,367 INFO L226 Difference]: Without dead ends: 805 [2021-03-10 21:51:00,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1527.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:51:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-03-10 21:51:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 715. [2021-03-10 21:51:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.7927170868347337) internal successors, (1994), 714 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1994 transitions. [2021-03-10 21:51:00,374 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1994 transitions. Word has length 17 [2021-03-10 21:51:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:00,374 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 1994 transitions. [2021-03-10 21:51:00,374 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) [2021-03-10 21:51:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1994 transitions. [2021-03-10 21:51:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:00,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:00,375 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:00,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-03-10 21:51:00,576 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash -801776318, now seen corresponding path program 260 times [2021-03-10 21:51:00,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:00,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021860766] [2021-03-10 21:51:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:00,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021860766] [2021-03-10 21:51:00,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643779165] [2021-03-10 21:51:00,928 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 [2021-03-10 21:51:00,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:01,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,406 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 [2021-03-10 21:51:01,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:01,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:01,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:01,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:01,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:01,593 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:01,594 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:01,594 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:01,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:01,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:01,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:01,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:01,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419987870] [2021-03-10 21:51:01,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:01,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:01,827 INFO L87 Difference]: Start difference. First operand 715 states and 1994 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) [2021-03-10 21:51:02,798 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:51:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:04,131 INFO L93 Difference]: Finished difference Result 895 states and 2332 transitions. [2021-03-10 21:51:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:51:04,133 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 [2021-03-10 21:51:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:04,135 INFO L225 Difference]: With dead ends: 895 [2021-03-10 21:51:04,135 INFO L226 Difference]: Without dead ends: 895 [2021-03-10 21:51:04,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1940.0ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:51:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-03-10 21:51:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 705. [2021-03-10 21:51:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.784090909090909) internal successors, (1960), 704 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1960 transitions. [2021-03-10 21:51:04,144 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1960 transitions. Word has length 17 [2021-03-10 21:51:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:04,144 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 1960 transitions. [2021-03-10 21:51:04,144 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) [2021-03-10 21:51:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1960 transitions. [2021-03-10 21:51:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:04,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:04,145 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:04,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-03-10 21:51:04,345 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -160090, now seen corresponding path program 261 times [2021-03-10 21:51:04,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:04,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995703561] [2021-03-10 21:51:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:04,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995703561] [2021-03-10 21:51:04,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59421033] [2021-03-10 21:51:04,741 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 [2021-03-10 21:51:04,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:04,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:04,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:05,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:05,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,237 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 17 treesize of output 13 [2021-03-10 21:51:05,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,251 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 [2021-03-10 21:51:05,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:05,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,395 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:05,396 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:05,396 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:05,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:05,398 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:05,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:05,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929859850] [2021-03-10 21:51:05,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:05,670 INFO L87 Difference]: Start difference. First operand 705 states and 1960 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) [2021-03-10 21:51:06,771 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:51:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:07,369 INFO L93 Difference]: Finished difference Result 812 states and 2176 transitions. [2021-03-10 21:51:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:51:07,373 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 [2021-03-10 21:51:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:07,374 INFO L225 Difference]: With dead ends: 812 [2021-03-10 21:51:07,374 INFO L226 Difference]: Without dead ends: 809 [2021-03-10 21:51:07,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1684.3ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:51:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-03-10 21:51:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 707. [2021-03-10 21:51:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.784702549575071) internal successors, (1966), 706 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1966 transitions. [2021-03-10 21:51:07,382 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1966 transitions. Word has length 17 [2021-03-10 21:51:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:07,382 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 1966 transitions. [2021-03-10 21:51:07,382 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) [2021-03-10 21:51:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1966 transitions. [2021-03-10 21:51:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:07,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:07,383 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:07,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1877 [2021-03-10 21:51:07,583 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1718183616, now seen corresponding path program 262 times [2021-03-10 21:51:07,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:07,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839981890] [2021-03-10 21:51:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:08,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839981890] [2021-03-10 21:51:08,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233396193] [2021-03-10 21:51:08,016 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 [2021-03-10 21:51:08,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:08,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:08,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:08,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,495 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 16 treesize of output 12 [2021-03-10 21:51:08,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,506 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 15 treesize of output 11 [2021-03-10 21:51:08,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,646 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:08,648 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:08,648 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:08,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:08,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:08,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:08,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327793151] [2021-03-10 21:51:08,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:08,882 INFO L87 Difference]: Start difference. First operand 707 states and 1966 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) [2021-03-10 21:51:09,896 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-03-10 21:51:10,211 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:51:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:10,230 INFO L93 Difference]: Finished difference Result 810 states and 2174 transitions. [2021-03-10 21:51:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:51:10,234 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 [2021-03-10 21:51:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:10,235 INFO L225 Difference]: With dead ends: 810 [2021-03-10 21:51:10,235 INFO L226 Difference]: Without dead ends: 810 [2021-03-10 21:51:10,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1309.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:51:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-03-10 21:51:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 701. [2021-03-10 21:51:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.7814285714285716) internal successors, (1947), 700 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1947 transitions. [2021-03-10 21:51:10,243 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1947 transitions. Word has length 17 [2021-03-10 21:51:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:10,243 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 1947 transitions. [2021-03-10 21:51:10,243 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) [2021-03-10 21:51:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1947 transitions. [2021-03-10 21:51:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:10,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:10,244 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:10,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1883 [2021-03-10 21:51:10,444 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:10,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2143240642, now seen corresponding path program 263 times [2021-03-10 21:51:10,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:10,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508265746] [2021-03-10 21:51:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:10,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508265746] [2021-03-10 21:51:10,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917546606] [2021-03-10 21:51:10,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:10,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:10,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:11,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,310 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 [2021-03-10 21:51:11,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:11,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,416 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:51:11,416 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:11,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:51:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:11,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:11,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:11,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121901104] [2021-03-10 21:51:11,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:11,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:11,513 INFO L87 Difference]: Start difference. First operand 701 states and 1947 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) [2021-03-10 21:51:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:13,029 INFO L93 Difference]: Finished difference Result 811 states and 2192 transitions. [2021-03-10 21:51:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:13,033 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 [2021-03-10 21:51:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:13,034 INFO L225 Difference]: With dead ends: 811 [2021-03-10 21:51:13,034 INFO L226 Difference]: Without dead ends: 811 [2021-03-10 21:51:13,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:51:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-03-10 21:51:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 703. [2021-03-10 21:51:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.782051282051282) internal successors, (1953), 702 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1953 transitions. [2021-03-10 21:51:13,042 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1953 transitions. Word has length 17 [2021-03-10 21:51:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:13,042 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1953 transitions. [2021-03-10 21:51:13,042 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) [2021-03-10 21:51:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1953 transitions. [2021-03-10 21:51:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:13,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:13,043 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:13,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1887 [2021-03-10 21:51:13,243 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash -589191518, now seen corresponding path program 264 times [2021-03-10 21:51:13,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:13,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607608852] [2021-03-10 21:51:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:13,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607608852] [2021-03-10 21:51:13,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107976798] [2021-03-10 21:51:13,553 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 [2021-03-10 21:51:13,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:51:13,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:14,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:14,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:51:14,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:51:14,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:14,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:14,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:14,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,386 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:51:14,387 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:51:14,387 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:14,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:14,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:51:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:14,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:14,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:14,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590469906] [2021-03-10 21:51:14,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:14,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:14,505 INFO L87 Difference]: Start difference. First operand 703 states and 1953 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) [2021-03-10 21:51:15,416 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:51:15,982 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 21:51:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:16,144 INFO L93 Difference]: Finished difference Result 781 states and 2124 transitions. [2021-03-10 21:51:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:51:16,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:16,148 INFO L225 Difference]: With dead ends: 781 [2021-03-10 21:51:16,148 INFO L226 Difference]: Without dead ends: 775 [2021-03-10 21:51:16,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1627.6ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:51:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-03-10 21:51:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 703. [2021-03-10 21:51:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.7777777777777777) internal successors, (1950), 702 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1950 transitions. [2021-03-10 21:51:16,156 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1950 transitions. Word has length 17 [2021-03-10 21:51:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:16,156 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1950 transitions. [2021-03-10 21:51:16,156 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) [2021-03-10 21:51:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1950 transitions. [2021-03-10 21:51:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:16,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:16,157 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:16,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:16,357 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash -288346720, now seen corresponding path program 265 times [2021-03-10 21:51:16,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:16,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911289528] [2021-03-10 21:51:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:16,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911289528] [2021-03-10 21:51:16,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79261939] [2021-03-10 21:51:16,696 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 [2021-03-10 21:51:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:17,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:17,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,133 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 17 treesize of output 13 [2021-03-10 21:51:17,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:17,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,159 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 15 treesize of output 11 [2021-03-10 21:51:17,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,305 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:17,306 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:17,307 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:17,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:17,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:17,584 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-03-10 21:51:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:17,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:17,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805808188] [2021-03-10 21:51:17,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:17,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:17,621 INFO L87 Difference]: Start difference. First operand 703 states and 1950 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) [2021-03-10 21:51:19,461 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:51:19,942 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:51:20,182 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:51:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:20,505 INFO L93 Difference]: Finished difference Result 828 states and 2221 transitions. [2021-03-10 21:51:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:51:20,508 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 [2021-03-10 21:51:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:20,509 INFO L225 Difference]: With dead ends: 828 [2021-03-10 21:51:20,509 INFO L226 Difference]: Without dead ends: 824 [2021-03-10 21:51:20,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2640.1ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:51:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-03-10 21:51:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 715. [2021-03-10 21:51:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.7857142857142856) internal successors, (1989), 714 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1989 transitions. [2021-03-10 21:51:20,516 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1989 transitions. Word has length 17 [2021-03-10 21:51:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:20,516 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 1989 transitions. [2021-03-10 21:51:20,517 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) [2021-03-10 21:51:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1989 transitions. [2021-03-10 21:51:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:20,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:20,517 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:20,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1897,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:20,718 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:20,718 INFO L82 PathProgramCache]: Analyzing trace with hash -830512924, now seen corresponding path program 266 times [2021-03-10 21:51:20,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:20,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368220836] [2021-03-10 21:51:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:21,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368220836] [2021-03-10 21:51:21,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494456763] [2021-03-10 21:51:21,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:21,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:21,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:21,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:21,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:21,575 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 [2021-03-10 21:51:21,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:21,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:21,586 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 15 treesize of output 11 [2021-03-10 21:51:21,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:21,675 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:51:21,675 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:21,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:21,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:51:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:21,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:21,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:21,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881573773] [2021-03-10 21:51:21,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:21,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:21,763 INFO L87 Difference]: Start difference. First operand 715 states and 1989 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) [2021-03-10 21:51:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:23,911 INFO L93 Difference]: Finished difference Result 936 states and 2430 transitions. [2021-03-10 21:51:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:51:23,915 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 [2021-03-10 21:51:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:23,916 INFO L225 Difference]: With dead ends: 936 [2021-03-10 21:51:23,916 INFO L226 Difference]: Without dead ends: 936 [2021-03-10 21:51:23,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1311.9ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:51:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-03-10 21:51:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 732. [2021-03-10 21:51:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.7975376196990425) internal successors, (2045), 731 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) [2021-03-10 21:51:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2045 transitions. [2021-03-10 21:51:23,925 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2045 transitions. Word has length 17 [2021-03-10 21:51:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:23,925 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 2045 transitions. [2021-03-10 21:51:23,925 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) [2021-03-10 21:51:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2045 transitions. [2021-03-10 21:51:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:23,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:23,926 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:24,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:24,126 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1750213632, now seen corresponding path program 267 times [2021-03-10 21:51:24,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:24,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511162637] [2021-03-10 21:51:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:24,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511162637] [2021-03-10 21:51:24,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452569378] [2021-03-10 21:51:24,442 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 [2021-03-10 21:51:24,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:51:24,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:25,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,018 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 16 treesize of output 12 [2021-03-10 21:51:25,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:51:25,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:51:25,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:25,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:25,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:25,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,216 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:51:25,217 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:51:25,217 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:25,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:25,221 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:51:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:25,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:25,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:25,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089664860] [2021-03-10 21:51:25,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:25,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:25,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:25,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:25,350 INFO L87 Difference]: Start difference. First operand 732 states and 2045 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) [2021-03-10 21:51:25,744 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-10 21:51:27,082 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:51:27,748 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 21:51:27,928 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 21:51:28,330 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 21:51:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:28,503 INFO L93 Difference]: Finished difference Result 858 states and 2283 transitions. [2021-03-10 21:51:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:51:28,507 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 [2021-03-10 21:51:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:28,508 INFO L225 Difference]: With dead ends: 858 [2021-03-10 21:51:28,508 INFO L226 Difference]: Without dead ends: 854 [2021-03-10 21:51:28,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2326.4ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:51:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-03-10 21:51:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 732. [2021-03-10 21:51:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.7852257181942544) internal successors, (2036), 731 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2036 transitions. [2021-03-10 21:51:28,516 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2036 transitions. Word has length 17 [2021-03-10 21:51:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:28,516 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 2036 transitions. [2021-03-10 21:51:28,516 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) [2021-03-10 21:51:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2036 transitions. [2021-03-10 21:51:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:28,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:28,517 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:28,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:28,717 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash 784738660, now seen corresponding path program 268 times [2021-03-10 21:51:28,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:28,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688336767] [2021-03-10 21:51:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:29,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688336767] [2021-03-10 21:51:29,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619878677] [2021-03-10 21:51:29,077 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 [2021-03-10 21:51:29,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:29,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,461 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 [2021-03-10 21:51:29,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,474 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 [2021-03-10 21:51:29,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:29,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:29,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,622 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:29,623 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:29,623 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:29,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:29,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:29,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:29,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:29,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103582638] [2021-03-10 21:51:29,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:29,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:29,765 INFO L87 Difference]: Start difference. First operand 732 states and 2036 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) [2021-03-10 21:51:30,218 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 21:51:30,988 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 21:51:31,894 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:51:32,445 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 21:51:32,726 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:51:33,510 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:51:33,671 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:51:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:34,072 INFO L93 Difference]: Finished difference Result 919 states and 2374 transitions. [2021-03-10 21:51:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:51:34,075 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 [2021-03-10 21:51:34,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:34,076 INFO L225 Difference]: With dead ends: 919 [2021-03-10 21:51:34,076 INFO L226 Difference]: Without dead ends: 914 [2021-03-10 21:51:34,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3134.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:51:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-03-10 21:51:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 728. [2021-03-10 21:51:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.768913342503439) internal successors, (2013), 727 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2013 transitions. [2021-03-10 21:51:34,085 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2013 transitions. Word has length 17 [2021-03-10 21:51:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:34,085 INFO L480 AbstractCegarLoop]: Abstraction has 728 states and 2013 transitions. [2021-03-10 21:51:34,085 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) [2021-03-10 21:51:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2013 transitions. [2021-03-10 21:51:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:34,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:34,086 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:34,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:34,287 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1982779774, now seen corresponding path program 269 times [2021-03-10 21:51:34,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:34,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313646971] [2021-03-10 21:51:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:34,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313646971] [2021-03-10 21:51:34,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146791941] [2021-03-10 21:51:34,676 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 [2021-03-10 21:51:34,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:51:34,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:35,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,081 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 [2021-03-10 21:51:35,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:35,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:35,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:35,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,284 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:35,285 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:35,285 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:35,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:35,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:35,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:35,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:35,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133612021] [2021-03-10 21:51:35,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:35,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:35,493 INFO L87 Difference]: Start difference. First operand 728 states and 2013 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) [2021-03-10 21:51:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:38,354 INFO L93 Difference]: Finished difference Result 975 states and 2487 transitions. [2021-03-10 21:51:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:51:38,357 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 [2021-03-10 21:51:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:38,358 INFO L225 Difference]: With dead ends: 975 [2021-03-10 21:51:38,358 INFO L226 Difference]: Without dead ends: 975 [2021-03-10 21:51:38,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2234.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:51:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-03-10 21:51:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 743. [2021-03-10 21:51:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.7830188679245285) internal successors, (2065), 742 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2065 transitions. [2021-03-10 21:51:38,368 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2065 transitions. Word has length 17 [2021-03-10 21:51:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:38,368 INFO L480 AbstractCegarLoop]: Abstraction has 743 states and 2065 transitions. [2021-03-10 21:51:38,368 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) [2021-03-10 21:51:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2065 transitions. [2021-03-10 21:51:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:38,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:38,369 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:38,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:38,569 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1510571294, now seen corresponding path program 270 times [2021-03-10 21:51:38,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:38,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776303617] [2021-03-10 21:51:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:38,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776303617] [2021-03-10 21:51:38,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072010263] [2021-03-10 21:51:38,947 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 [2021-03-10 21:51:38,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:51:38,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:39,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:39,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,363 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 17 treesize of output 13 [2021-03-10 21:51:39,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:39,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:39,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,547 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:39,549 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:39,549 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:39,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:39,551 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:39,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:39,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72968433] [2021-03-10 21:51:39,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:39,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:39,848 INFO L87 Difference]: Start difference. First operand 743 states and 2065 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) [2021-03-10 21:51:40,752 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:51:41,433 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:51:41,880 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:51:42,219 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:51:42,716 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:51:43,402 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:51:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:44,027 INFO L93 Difference]: Finished difference Result 951 states and 2450 transitions. [2021-03-10 21:51:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:51:44,030 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 [2021-03-10 21:51:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:44,032 INFO L225 Difference]: With dead ends: 951 [2021-03-10 21:51:44,032 INFO L226 Difference]: Without dead ends: 943 [2021-03-10 21:51:44,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3465.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:51:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-03-10 21:51:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 749. [2021-03-10 21:51:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.770053475935829) internal successors, (2072), 748 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2072 transitions. [2021-03-10 21:51:44,041 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2072 transitions. Word has length 17 [2021-03-10 21:51:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 2072 transitions. [2021-03-10 21:51:44,042 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) [2021-03-10 21:51:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2072 transitions. [2021-03-10 21:51:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:44,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:44,042 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:44,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1921,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:44,243 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:44,243 INFO L82 PathProgramCache]: Analyzing trace with hash 207772412, now seen corresponding path program 271 times [2021-03-10 21:51:44,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:44,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649145765] [2021-03-10 21:51:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649145765] [2021-03-10 21:51:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487128346] [2021-03-10 21:51:44,630 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 [2021-03-10 21:51:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:45,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,006 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 [2021-03-10 21:51:45,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:45,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:45,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:45,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,192 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:51:45,193 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:51:45,193 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:45,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:45,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:51:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:45,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:45,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:45,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110370464] [2021-03-10 21:51:45,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:45,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:45,440 INFO L87 Difference]: Start difference. First operand 749 states and 2072 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) [2021-03-10 21:51:47,207 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:51:47,727 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 21:51:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:48,519 INFO L93 Difference]: Finished difference Result 934 states and 2427 transitions. [2021-03-10 21:51:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:51:48,523 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 [2021-03-10 21:51:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:48,524 INFO L225 Difference]: With dead ends: 934 [2021-03-10 21:51:48,524 INFO L226 Difference]: Without dead ends: 934 [2021-03-10 21:51:48,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2272.9ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:51:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-03-10 21:51:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 746. [2021-03-10 21:51:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.7651006711409396) internal successors, (2060), 745 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2060 transitions. [2021-03-10 21:51:48,533 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2060 transitions. Word has length 17 [2021-03-10 21:51:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:48,533 INFO L480 AbstractCegarLoop]: Abstraction has 746 states and 2060 transitions. [2021-03-10 21:51:48,533 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) [2021-03-10 21:51:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2060 transitions. [2021-03-10 21:51:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:48,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:48,534 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:48,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1927,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:48,735 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1502840896, now seen corresponding path program 272 times [2021-03-10 21:51:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786894914] [2021-03-10 21:51:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:49,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786894914] [2021-03-10 21:51:49,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768401459] [2021-03-10 21:51:49,103 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 [2021-03-10 21:51:49,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:49,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:49,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:49,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:49,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:49,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:49,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,676 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:51:49,676 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:49,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:51:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:49,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:49,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:49,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341191957] [2021-03-10 21:51:49,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:49,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:49,794 INFO L87 Difference]: Start difference. First operand 746 states and 2060 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) [2021-03-10 21:51:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:51,663 INFO L93 Difference]: Finished difference Result 956 states and 2479 transitions. [2021-03-10 21:51:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:51:51,667 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 [2021-03-10 21:51:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:51,668 INFO L225 Difference]: With dead ends: 956 [2021-03-10 21:51:51,668 INFO L226 Difference]: Without dead ends: 956 [2021-03-10 21:51:51,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:51:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-03-10 21:51:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 734. [2021-03-10 21:51:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.757162346521146) internal successors, (2021), 733 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2021 transitions. [2021-03-10 21:51:51,677 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2021 transitions. Word has length 17 [2021-03-10 21:51:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:51,677 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2021 transitions. [2021-03-10 21:51:51,677 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) [2021-03-10 21:51:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2021 transitions. [2021-03-10 21:51:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:51,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:51,678 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:51,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1931,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:51,879 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1801815964, now seen corresponding path program 273 times [2021-03-10 21:51:51,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:51,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654021249] [2021-03-10 21:51:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:52,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654021249] [2021-03-10 21:51:52,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551198939] [2021-03-10 21:51:52,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:52,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:52,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:52,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:52,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,955 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:51:52,955 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:52,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,958 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:51:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:53,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:53,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:53,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469141579] [2021-03-10 21:51:53,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:53,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:53,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:53,062 INFO L87 Difference]: Start difference. First operand 734 states and 2021 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) [2021-03-10 21:51:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:54,568 INFO L93 Difference]: Finished difference Result 856 states and 2253 transitions. [2021-03-10 21:51:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:54,572 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 [2021-03-10 21:51:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:54,574 INFO L225 Difference]: With dead ends: 856 [2021-03-10 21:51:54,574 INFO L226 Difference]: Without dead ends: 856 [2021-03-10 21:51:54,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-03-10 21:51:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 759. [2021-03-10 21:51:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.762532981530343) internal successors, (2094), 758 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2094 transitions. [2021-03-10 21:51:54,582 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2094 transitions. Word has length 17 [2021-03-10 21:51:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:54,582 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2094 transitions. [2021-03-10 21:51:54,582 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) [2021-03-10 21:51:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2094 transitions. [2021-03-10 21:51:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:54,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:54,583 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:54,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1933 [2021-03-10 21:51:54,783 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1562268744, now seen corresponding path program 274 times [2021-03-10 21:51:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690627945] [2021-03-10 21:51:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690627945] [2021-03-10 21:51:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266151463] [2021-03-10 21:51:55,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:55,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:55,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:55,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:55,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:55,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:51:55,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:51:55,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:55,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:55,728 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 17 treesize of output 13 [2021-03-10 21:51:55,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:55,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,912 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:51:55,913 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:51:55,913 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:55,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:55,917 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:51:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:56,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:56,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311913256] [2021-03-10 21:51:56,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:56,071 INFO L87 Difference]: Start difference. First operand 759 states and 2094 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) [2021-03-10 21:51:56,677 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 21:51:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:58,123 INFO L93 Difference]: Finished difference Result 837 states and 2205 transitions. [2021-03-10 21:51:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:51:58,127 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 [2021-03-10 21:51:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:58,128 INFO L225 Difference]: With dead ends: 837 [2021-03-10 21:51:58,128 INFO L226 Difference]: Without dead ends: 829 [2021-03-10 21:51:58,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1910.3ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:51:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-03-10 21:51:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 764. [2021-03-10 21:51:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.750982961992136) internal successors, (2099), 763 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2099 transitions. [2021-03-10 21:51:58,136 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2099 transitions. Word has length 17 [2021-03-10 21:51:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:58,136 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2099 transitions. [2021-03-10 21:51:58,137 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) [2021-03-10 21:51:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2099 transitions. [2021-03-10 21:51:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:58,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:58,137 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:58,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:58,338 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:58,338 INFO L82 PathProgramCache]: Analyzing trace with hash 640793850, now seen corresponding path program 275 times [2021-03-10 21:51:58,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:58,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49655347] [2021-03-10 21:51:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:58,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49655347] [2021-03-10 21:51:58,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995121095] [2021-03-10 21:51:58,735 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 [2021-03-10 21:51:58,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:51:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:59,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:59,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:59,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:51:59,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:59,432 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 15 treesize of output 11 [2021-03-10 21:51:59,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:59,526 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:51:59,526 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:51:59,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:59,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:51:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:59,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:59,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732437972] [2021-03-10 21:51:59,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:59,632 INFO L87 Difference]: Start difference. First operand 764 states and 2099 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) [2021-03-10 21:52:01,250 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:52:01,849 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:52:02,101 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 21:52:02,350 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:52:02,727 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:52:03,241 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:52:03,576 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 21:52:03,980 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:52:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:04,372 INFO L93 Difference]: Finished difference Result 918 states and 2366 transitions. [2021-03-10 21:52:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:52:04,375 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 [2021-03-10 21:52:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:04,377 INFO L225 Difference]: With dead ends: 918 [2021-03-10 21:52:04,377 INFO L226 Difference]: Without dead ends: 918 [2021-03-10 21:52:04,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 3682.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:52:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-03-10 21:52:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 761. [2021-03-10 21:52:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.7605263157894737) internal successors, (2098), 760 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2098 transitions. [2021-03-10 21:52:04,386 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2098 transitions. Word has length 17 [2021-03-10 21:52:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:04,386 INFO L480 AbstractCegarLoop]: Abstraction has 761 states and 2098 transitions. [2021-03-10 21:52:04,386 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) [2021-03-10 21:52:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2098 transitions. [2021-03-10 21:52:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:04,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:04,387 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:04,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:04,587 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2100124322, now seen corresponding path program 276 times [2021-03-10 21:52:04,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:04,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305930055] [2021-03-10 21:52:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:04,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305930055] [2021-03-10 21:52:04,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699446528] [2021-03-10 21:52:04,984 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 [2021-03-10 21:52:05,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:52:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:05,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:05,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:05,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:05,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:05,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:05,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:05,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:06,045 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:52:06,047 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:52:06,047 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:06,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:06,051 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:52:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:06,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:06,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:06,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744108432] [2021-03-10 21:52:06,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:06,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:06,200 INFO L87 Difference]: Start difference. First operand 761 states and 2098 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) [2021-03-10 21:52:07,355 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:52:08,056 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:52:08,613 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:52:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:09,117 INFO L93 Difference]: Finished difference Result 843 states and 2217 transitions. [2021-03-10 21:52:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:52:09,120 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 [2021-03-10 21:52:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:09,121 INFO L225 Difference]: With dead ends: 843 [2021-03-10 21:52:09,121 INFO L226 Difference]: Without dead ends: 837 [2021-03-10 21:52:09,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2539.7ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:52:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-03-10 21:52:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 764. [2021-03-10 21:52:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.7549148099606815) internal successors, (2102), 763 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2102 transitions. [2021-03-10 21:52:09,130 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2102 transitions. Word has length 17 [2021-03-10 21:52:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:09,130 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2102 transitions. [2021-03-10 21:52:09,130 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) [2021-03-10 21:52:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2102 transitions. [2021-03-10 21:52:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:09,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:09,131 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:09,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1946,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:09,332 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 880436188, now seen corresponding path program 277 times [2021-03-10 21:52:09,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:09,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103105437] [2021-03-10 21:52:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:09,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103105437] [2021-03-10 21:52:09,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258656456] [2021-03-10 21:52:09,751 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 [2021-03-10 21:52:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:10,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:10,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,601 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:52:10,601 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:10,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,604 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:52:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:10,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:10,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:10,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028188460] [2021-03-10 21:52:10,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:10,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:10,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:10,713 INFO L87 Difference]: Start difference. First operand 764 states and 2102 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) [2021-03-10 21:52:12,595 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 21:52:12,986 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:52:13,314 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:52:13,739 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:52:14,483 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:52:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:15,021 INFO L93 Difference]: Finished difference Result 905 states and 2348 transitions. [2021-03-10 21:52:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:52:15,025 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 [2021-03-10 21:52:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:15,026 INFO L225 Difference]: With dead ends: 905 [2021-03-10 21:52:15,026 INFO L226 Difference]: Without dead ends: 905 [2021-03-10 21:52:15,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2891.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:52:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-03-10 21:52:15,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 762. [2021-03-10 21:52:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.7647831800262814) internal successors, (2104), 761 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2104 transitions. [2021-03-10 21:52:15,035 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2104 transitions. Word has length 17 [2021-03-10 21:52:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:15,035 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2104 transitions. [2021-03-10 21:52:15,035 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) [2021-03-10 21:52:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2104 transitions. [2021-03-10 21:52:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:15,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:15,036 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:15,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1953,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:15,236 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash -39264520, now seen corresponding path program 278 times [2021-03-10 21:52:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:15,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391928439] [2021-03-10 21:52:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391928439] [2021-03-10 21:52:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259834286] [2021-03-10 21:52:15,645 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 [2021-03-10 21:52:15,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:15,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:15,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:16,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,471 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 16 treesize of output 12 [2021-03-10 21:52:16,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:16,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:16,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:16,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,530 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 17 treesize of output 13 [2021-03-10 21:52:16,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:16,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,701 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:52:16,702 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:52:16,702 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:16,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:16,706 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:52:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:16,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:16,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:16,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422740768] [2021-03-10 21:52:16,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:16,851 INFO L87 Difference]: Start difference. First operand 762 states and 2104 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) [2021-03-10 21:52:18,324 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:52:18,803 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 21:52:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:18,872 INFO L93 Difference]: Finished difference Result 797 states and 2165 transitions. [2021-03-10 21:52:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:18,876 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 [2021-03-10 21:52:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:18,878 INFO L225 Difference]: With dead ends: 797 [2021-03-10 21:52:18,878 INFO L226 Difference]: Without dead ends: 792 [2021-03-10 21:52:18,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2020.0ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:52:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-03-10 21:52:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 763. [2021-03-10 21:52:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.7598425196850394) internal successors, (2103), 762 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2103 transitions. [2021-03-10 21:52:18,886 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2103 transitions. Word has length 17 [2021-03-10 21:52:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:18,886 INFO L480 AbstractCegarLoop]: Abstraction has 763 states and 2103 transitions. [2021-03-10 21:52:18,886 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) [2021-03-10 21:52:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2103 transitions. [2021-03-10 21:52:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:18,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:18,887 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:19,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1956 [2021-03-10 21:52:19,088 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 888166586, now seen corresponding path program 279 times [2021-03-10 21:52:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421495126] [2021-03-10 21:52:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:19,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421495126] [2021-03-10 21:52:19,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997630959] [2021-03-10 21:52:19,506 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 [2021-03-10 21:52:19,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:20,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,112 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 [2021-03-10 21:52:20,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:20,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:20,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:20,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,323 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:52:20,325 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:52:20,325 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:20,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:20,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:52:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:20,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:20,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:20,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059711467] [2021-03-10 21:52:20,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:20,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:20,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:20,602 INFO L87 Difference]: Start difference. First operand 763 states and 2103 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) [2021-03-10 21:52:21,269 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 21:52:21,693 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:52:22,567 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:52:22,785 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 21:52:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:23,131 INFO L93 Difference]: Finished difference Result 923 states and 2377 transitions. [2021-03-10 21:52:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:52:23,134 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 [2021-03-10 21:52:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:23,135 INFO L225 Difference]: With dead ends: 923 [2021-03-10 21:52:23,135 INFO L226 Difference]: Without dead ends: 923 [2021-03-10 21:52:23,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2432.2ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-03-10 21:52:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 754. [2021-03-10 21:52:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.752988047808765) internal successors, (2073), 753 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2073 transitions. [2021-03-10 21:52:23,144 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2073 transitions. Word has length 17 [2021-03-10 21:52:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:23,144 INFO L480 AbstractCegarLoop]: Abstraction has 754 states and 2073 transitions. [2021-03-10 21:52:23,144 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) [2021-03-10 21:52:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2073 transitions. [2021-03-10 21:52:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:23,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:23,145 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:23,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:23,346 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1689782814, now seen corresponding path program 280 times [2021-03-10 21:52:23,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:23,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317491754] [2021-03-10 21:52:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:23,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317491754] [2021-03-10 21:52:23,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446218059] [2021-03-10 21:52:23,786 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 [2021-03-10 21:52:23,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:24,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:24,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,359 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 17 treesize of output 13 [2021-03-10 21:52:24,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,374 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 [2021-03-10 21:52:24,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:24,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:24,550 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:52:24,551 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:52:24,552 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:24,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:24,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:52:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:24,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:24,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:24,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389700320] [2021-03-10 21:52:24,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:24,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:24,872 INFO L87 Difference]: Start difference. First operand 754 states and 2073 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) [2021-03-10 21:52:25,275 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:52:26,139 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2021-03-10 21:52:26,913 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:52:27,190 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:52:27,697 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 21:52:27,979 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:52:28,150 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2021-03-10 21:52:28,639 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:52:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:28,748 INFO L93 Difference]: Finished difference Result 884 states and 2298 transitions. [2021-03-10 21:52:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:52:28,751 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 [2021-03-10 21:52:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:28,752 INFO L225 Difference]: With dead ends: 884 [2021-03-10 21:52:28,752 INFO L226 Difference]: Without dead ends: 880 [2021-03-10 21:52:28,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3189.2ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:52:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-03-10 21:52:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 767. [2021-03-10 21:52:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.765013054830287) internal successors, (2118), 766 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2118 transitions. [2021-03-10 21:52:28,761 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2118 transitions. Word has length 17 [2021-03-10 21:52:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:28,761 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2118 transitions. [2021-03-10 21:52:28,761 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) [2021-03-10 21:52:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2118 transitions. [2021-03-10 21:52:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:28,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:28,762 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:28,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1967 [2021-03-10 21:52:28,962 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash -886840776, now seen corresponding path program 281 times [2021-03-10 21:52:28,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:28,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543432858] [2021-03-10 21:52:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:29,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543432858] [2021-03-10 21:52:29,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218576709] [2021-03-10 21:52:29,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:29,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:29,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:29,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:29,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:29,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:30,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:30,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,161 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:52:30,162 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:52:30,162 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:30,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:30,165 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:52:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:30,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:30,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:30,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091635661] [2021-03-10 21:52:30,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:30,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:30,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:30,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:30,406 INFO L87 Difference]: Start difference. First operand 767 states and 2118 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) [2021-03-10 21:52:31,634 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:52:32,191 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-03-10 21:52:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:32,493 INFO L93 Difference]: Finished difference Result 867 states and 2272 transitions. [2021-03-10 21:52:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:32,496 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 [2021-03-10 21:52:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:32,497 INFO L225 Difference]: With dead ends: 867 [2021-03-10 21:52:32,497 INFO L226 Difference]: Without dead ends: 867 [2021-03-10 21:52:32,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1685.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:52:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-03-10 21:52:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 759. [2021-03-10 21:52:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.757255936675462) internal successors, (2090), 758 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2090 transitions. [2021-03-10 21:52:32,506 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2090 transitions. Word has length 17 [2021-03-10 21:52:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:32,506 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2090 transitions. [2021-03-10 21:52:32,506 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) [2021-03-10 21:52:32,506 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2090 transitions. [2021-03-10 21:52:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:32,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:32,507 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:32,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1973 [2021-03-10 21:52:32,707 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash -10398598, now seen corresponding path program 282 times [2021-03-10 21:52:32,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:32,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299600454] [2021-03-10 21:52:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:33,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299600454] [2021-03-10 21:52:33,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265428452] [2021-03-10 21:52:33,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:33,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:52:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:33,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:33,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:33,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:33,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:33,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,655 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:52:33,655 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:33,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:52:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:33,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:33,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:33,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436408171] [2021-03-10 21:52:33,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:33,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:33,711 INFO L87 Difference]: Start difference. First operand 759 states and 2090 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) [2021-03-10 21:52:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:35,130 INFO L93 Difference]: Finished difference Result 888 states and 2344 transitions. [2021-03-10 21:52:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:35,134 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 [2021-03-10 21:52:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:35,135 INFO L225 Difference]: With dead ends: 888 [2021-03-10 21:52:35,135 INFO L226 Difference]: Without dead ends: 888 [2021-03-10 21:52:35,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 719.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-03-10 21:52:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 771. [2021-03-10 21:52:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.7636363636363637) internal successors, (2128), 770 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2128 transitions. [2021-03-10 21:52:35,145 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2128 transitions. Word has length 17 [2021-03-10 21:52:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:35,145 INFO L480 AbstractCegarLoop]: Abstraction has 771 states and 2128 transitions. [2021-03-10 21:52:35,145 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) [2021-03-10 21:52:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2128 transitions. [2021-03-10 21:52:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:35,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:35,146 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:35,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1977,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:35,346 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:35,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1543650526, now seen corresponding path program 283 times [2021-03-10 21:52:35,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:35,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137564159] [2021-03-10 21:52:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:35,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137564159] [2021-03-10 21:52:35,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671672672] [2021-03-10 21:52:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:36,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:36,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:36,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:36,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:36,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:36,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:36,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:36,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:36,421 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 7 treesize of output 5 [2021-03-10 21:52:36,426 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:36,595 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:52:36,597 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:52:36,597 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:36,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:36,601 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:52:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:36,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:36,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:36,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357177804] [2021-03-10 21:52:36,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:36,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:36,726 INFO L87 Difference]: Start difference. First operand 771 states and 2128 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) [2021-03-10 21:52:37,720 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:52:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:39,019 INFO L93 Difference]: Finished difference Result 832 states and 2221 transitions. [2021-03-10 21:52:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:52:39,023 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 [2021-03-10 21:52:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:39,025 INFO L225 Difference]: With dead ends: 832 [2021-03-10 21:52:39,025 INFO L226 Difference]: Without dead ends: 826 [2021-03-10 21:52:39,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1855.4ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-03-10 21:52:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 772. [2021-03-10 21:52:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.7587548638132295) internal successors, (2127), 771 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2127 transitions. [2021-03-10 21:52:39,034 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2127 transitions. Word has length 17 [2021-03-10 21:52:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:39,034 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2127 transitions. [2021-03-10 21:52:39,034 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) [2021-03-10 21:52:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2127 transitions. [2021-03-10 21:52:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:39,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:39,035 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:39,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-03-10 21:52:39,235 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 229243740, now seen corresponding path program 284 times [2021-03-10 21:52:39,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10816932] [2021-03-10 21:52:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:39,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10816932] [2021-03-10 21:52:39,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52800237] [2021-03-10 21:52:39,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:39,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:40,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:40,263 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 [2021-03-10 21:52:40,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:40,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:40,276 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 15 treesize of output 11 [2021-03-10 21:52:40,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:40,375 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:52:40,375 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:40,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:40,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:52:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:40,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:40,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:40,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021135292] [2021-03-10 21:52:40,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:40,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:40,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:40,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:40,484 INFO L87 Difference]: Start difference. First operand 772 states and 2127 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) [2021-03-10 21:52:41,995 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:52:42,701 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:52:43,309 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:52:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:43,653 INFO L93 Difference]: Finished difference Result 893 states and 2351 transitions. [2021-03-10 21:52:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:52:43,656 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 [2021-03-10 21:52:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:43,657 INFO L225 Difference]: With dead ends: 893 [2021-03-10 21:52:43,657 INFO L226 Difference]: Without dead ends: 893 [2021-03-10 21:52:43,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2314.5ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-03-10 21:52:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 772. [2021-03-10 21:52:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.761348897535668) internal successors, (2129), 771 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2129 transitions. [2021-03-10 21:52:43,672 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2129 transitions. Word has length 17 [2021-03-10 21:52:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:43,672 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2129 transitions. [2021-03-10 21:52:43,672 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) [2021-03-10 21:52:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2129 transitions. [2021-03-10 21:52:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:43,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:43,673 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:43,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1987,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:43,874 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:43,874 INFO L82 PathProgramCache]: Analyzing trace with hash -690456968, now seen corresponding path program 285 times [2021-03-10 21:52:43,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:43,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913039022] [2021-03-10 21:52:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:44,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913039022] [2021-03-10 21:52:44,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363150124] [2021-03-10 21:52:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:44,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:44,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:44,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:44,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:44,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:52:44,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:44,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:45,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:45,003 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 [2021-03-10 21:52:45,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:45,016 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 7 treesize of output 5 [2021-03-10 21:52:45,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:45,184 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:52:45,185 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:52:45,186 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:45,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:45,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:52:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:45,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:45,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:45,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77768565] [2021-03-10 21:52:45,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:45,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:45,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:45,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:45,336 INFO L87 Difference]: Start difference. First operand 772 states and 2129 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) [2021-03-10 21:52:45,693 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:52:46,977 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:52:47,606 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 21:52:47,813 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 21:52:48,209 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 21:52:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:48,283 INFO L93 Difference]: Finished difference Result 824 states and 2218 transitions. [2021-03-10 21:52:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:52:48,285 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 [2021-03-10 21:52:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:48,286 INFO L225 Difference]: With dead ends: 824 [2021-03-10 21:52:48,286 INFO L226 Difference]: Without dead ends: 822 [2021-03-10 21:52:48,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2599.9ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-03-10 21:52:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 774. [2021-03-10 21:52:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.760672703751617) internal successors, (2134), 773 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2134 transitions. [2021-03-10 21:52:48,293 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2134 transitions. Word has length 17 [2021-03-10 21:52:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:48,293 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 2134 transitions. [2021-03-10 21:52:48,293 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) [2021-03-10 21:52:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2134 transitions. [2021-03-10 21:52:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:48,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:48,294 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:48,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1990 [2021-03-10 21:52:48,494 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash 236974138, now seen corresponding path program 286 times [2021-03-10 21:52:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:48,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483893312] [2021-03-10 21:52:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:48,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483893312] [2021-03-10 21:52:48,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278608432] [2021-03-10 21:52:48,878 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:48,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:49,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,430 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 [2021-03-10 21:52:49,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:49,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,459 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 [2021-03-10 21:52:49,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,609 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:52:49,610 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:52:49,611 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:49,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:49,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:52:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:49,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:49,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521022881] [2021-03-10 21:52:49,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:49,855 INFO L87 Difference]: Start difference. First operand 774 states and 2134 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) [2021-03-10 21:52:50,427 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 21:52:50,660 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 21:52:51,362 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 21:52:51,861 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:52:52,153 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 21:52:52,495 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:52:52,768 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 21:52:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:53,054 INFO L93 Difference]: Finished difference Result 881 states and 2315 transitions. [2021-03-10 21:52:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:52:53,058 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 [2021-03-10 21:52:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:53,059 INFO L225 Difference]: With dead ends: 881 [2021-03-10 21:52:53,059 INFO L226 Difference]: Without dead ends: 878 [2021-03-10 21:52:53,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2642.9ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-03-10 21:52:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 768. [2021-03-10 21:52:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.7496740547588003) internal successors, (2109), 767 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2109 transitions. [2021-03-10 21:52:53,069 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2109 transitions. Word has length 17 [2021-03-10 21:52:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:53,069 INFO L480 AbstractCegarLoop]: Abstraction has 768 states and 2109 transitions. [2021-03-10 21:52:53,069 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) [2021-03-10 21:52:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2109 transitions. [2021-03-10 21:52:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:53,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:53,070 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:53,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1997,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:53,278 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1038590366, now seen corresponding path program 287 times [2021-03-10 21:52:53,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:53,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727491493] [2021-03-10 21:52:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:53,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727491493] [2021-03-10 21:52:53,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153331183] [2021-03-10 21:52:53,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:53,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:53,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:54,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:54,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,223 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 17 treesize of output 13 [2021-03-10 21:52:54,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:54,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:54,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:54,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:54,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:54,437 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:52:54,438 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:52:54,438 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:54,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:54,442 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:52:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:54,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:54,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:54,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604335012] [2021-03-10 21:52:54,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:54,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:54,769 INFO L87 Difference]: Start difference. First operand 768 states and 2109 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) [2021-03-10 21:52:55,696 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 13 [2021-03-10 21:52:56,174 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2021-03-10 21:52:56,660 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2021-03-10 21:52:56,990 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-03-10 21:52:57,305 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:52:57,622 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:52:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:57,683 INFO L93 Difference]: Finished difference Result 841 states and 2250 transitions. [2021-03-10 21:52:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:52:57,687 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 [2021-03-10 21:52:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:57,689 INFO L225 Difference]: With dead ends: 841 [2021-03-10 21:52:57,689 INFO L226 Difference]: Without dead ends: 837 [2021-03-10 21:52:57,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2882.4ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-03-10 21:52:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 772. [2021-03-10 21:52:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.7522697795071336) internal successors, (2122), 771 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2122 transitions. [2021-03-10 21:52:57,698 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2122 transitions. Word has length 17 [2021-03-10 21:52:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:57,698 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2122 transitions. [2021-03-10 21:52:57,698 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) [2021-03-10 21:52:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2122 transitions. [2021-03-10 21:52:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:57,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:57,699 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:57,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-03-10 21:52:57,900 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1538033224, now seen corresponding path program 288 times [2021-03-10 21:52:57,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:57,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119938419] [2021-03-10 21:52:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:58,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119938419] [2021-03-10 21:52:58,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866443118] [2021-03-10 21:52:58,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:58,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:52:58,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:58,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:52:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,800 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 [2021-03-10 21:52:58,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:58,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:52:58,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:58,845 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 [2021-03-10 21:52:58,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,019 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:52:59,020 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:52:59,020 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:52:59,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:59,023 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:52:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:59,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:59,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:52:59,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123946219] [2021-03-10 21:52:59,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:59,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:59,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:59,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:59,271 INFO L87 Difference]: Start difference. First operand 772 states and 2122 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) [2021-03-10 21:52:59,915 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:53:00,189 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2021-03-10 21:53:00,646 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-03-10 21:53:01,217 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2021-03-10 21:53:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:01,383 INFO L93 Difference]: Finished difference Result 836 states and 2243 transitions. [2021-03-10 21:53:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:53:01,388 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 [2021-03-10 21:53:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:01,389 INFO L225 Difference]: With dead ends: 836 [2021-03-10 21:53:01,389 INFO L226 Difference]: Without dead ends: 836 [2021-03-10 21:53:01,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1908.0ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:53:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-03-10 21:53:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 760. [2021-03-10 21:53:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.748353096179183) internal successors, (2086), 759 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2086 transitions. [2021-03-10 21:53:01,399 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2086 transitions. Word has length 17 [2021-03-10 21:53:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:01,399 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 2086 transitions. [2021-03-10 21:53:01,399 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) [2021-03-10 21:53:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2086 transitions. [2021-03-10 21:53:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:01,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:01,400 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:01,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2007,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:01,600 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash 208237532, now seen corresponding path program 289 times [2021-03-10 21:53:01,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:01,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412507364] [2021-03-10 21:53:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:01,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412507364] [2021-03-10 21:53:01,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458328128] [2021-03-10 21:53:01,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:02,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:02,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:02,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:02,586 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 16 treesize of output 12 [2021-03-10 21:53:02,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,685 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:53:02,686 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:02,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:53:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:02,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:02,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:53:02,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54636751] [2021-03-10 21:53:02,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:02,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:02,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:02,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:02,796 INFO L87 Difference]: Start difference. First operand 760 states and 2086 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) [2021-03-10 21:53:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:04,672 INFO L93 Difference]: Finished difference Result 875 states and 2308 transitions. [2021-03-10 21:53:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:04,675 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 [2021-03-10 21:53:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:04,676 INFO L225 Difference]: With dead ends: 875 [2021-03-10 21:53:04,676 INFO L226 Difference]: Without dead ends: 875 [2021-03-10 21:53:04,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1054.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-03-10 21:53:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 757. [2021-03-10 21:53:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.751322751322751) internal successors, (2080), 756 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2080 transitions. [2021-03-10 21:53:04,685 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2080 transitions. Word has length 17 [2021-03-10 21:53:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:04,685 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2080 transitions. [2021-03-10 21:53:04,685 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) [2021-03-10 21:53:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2080 transitions. [2021-03-10 21:53:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:04,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:04,686 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:04,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2011,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:04,887 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash -711463176, now seen corresponding path program 290 times [2021-03-10 21:53:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:04,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412830674] [2021-03-10 21:53:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:05,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412830674] [2021-03-10 21:53:05,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501513571] [2021-03-10 21:53:05,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:05,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:05,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:05,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:53:05,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:53:05,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:53:05,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,968 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 17 treesize of output 13 [2021-03-10 21:53:05,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:53:05,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:06,172 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:53:06,173 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:53:06,173 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:06,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:53:06,177 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:53:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:06,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:06,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:53:06,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019358493] [2021-03-10 21:53:06,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:06,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:06,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:06,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:06,327 INFO L87 Difference]: Start difference. First operand 757 states and 2080 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) [2021-03-10 21:53:07,671 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:53:08,254 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:53:08,412 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:53:08,711 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:53:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:08,828 INFO L93 Difference]: Finished difference Result 817 states and 2181 transitions. [2021-03-10 21:53:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:53:08,831 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 [2021-03-10 21:53:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:08,832 INFO L225 Difference]: With dead ends: 817 [2021-03-10 21:53:08,833 INFO L226 Difference]: Without dead ends: 813 [2021-03-10 21:53:08,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2076.7ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-03-10 21:53:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 757. [2021-03-10 21:53:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.747354497354497) internal successors, (2077), 756 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2077 transitions. [2021-03-10 21:53:08,841 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2077 transitions. Word has length 17 [2021-03-10 21:53:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:08,841 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2077 transitions. [2021-03-10 21:53:08,841 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) [2021-03-10 21:53:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2077 transitions. [2021-03-10 21:53:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:08,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:08,842 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:09,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2014,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:09,043 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:09,043 INFO L82 PathProgramCache]: Analyzing trace with hash 215967930, now seen corresponding path program 291 times [2021-03-10 21:53:09,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:09,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874610909] [2021-03-10 21:53:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874610909] [2021-03-10 21:53:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508398370] [2021-03-10 21:53:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:09,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:09,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:09,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:09,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:09,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:09,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:09,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:09,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:10,074 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:10,075 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:53:10,076 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:10,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:10,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:53:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:10,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:10,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:53:10,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889212849] [2021-03-10 21:53:10,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:10,336 INFO L87 Difference]: Start difference. First operand 757 states and 2077 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) [2021-03-10 21:53:10,887 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:53:11,679 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 21:53:12,318 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:53:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:12,725 INFO L93 Difference]: Finished difference Result 877 states and 2279 transitions. [2021-03-10 21:53:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:53:12,729 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 [2021-03-10 21:53:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:12,730 INFO L225 Difference]: With dead ends: 877 [2021-03-10 21:53:12,730 INFO L226 Difference]: Without dead ends: 875 [2021-03-10 21:53:12,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2014.6ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:53:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-03-10 21:53:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 752. [2021-03-10 21:53:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.7390146471371506) internal successors, (2057), 751 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2057 transitions. [2021-03-10 21:53:12,739 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2057 transitions. Word has length 17 [2021-03-10 21:53:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:12,740 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 2057 transitions. [2021-03-10 21:53:12,740 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) [2021-03-10 21:53:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2057 transitions. [2021-03-10 21:53:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:12,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:12,740 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:12,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:12,941 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1017584158, now seen corresponding path program 292 times [2021-03-10 21:53:12,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:12,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394238700] [2021-03-10 21:53:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:13,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394238700] [2021-03-10 21:53:13,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021414601] [2021-03-10 21:53:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:13,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:13,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:13,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,782 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 [2021-03-10 21:53:13,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,795 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 17 treesize of output 13 [2021-03-10 21:53:13,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,810 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 16 treesize of output 12 [2021-03-10 21:53:13,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:13,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,997 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:13,999 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:53:13,999 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:14,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:14,003 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:53:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:14,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:14,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:53:14,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252418848] [2021-03-10 21:53:14,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:14,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:14,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:14,322 INFO L87 Difference]: Start difference. First operand 752 states and 2057 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) [2021-03-10 21:53:15,823 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 21:53:16,376 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:53:16,742 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:53:17,082 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:53:17,301 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:53:17,466 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-03-10 21:53:17,746 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-10 21:53:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:18,104 INFO L93 Difference]: Finished difference Result 851 states and 2228 transitions. [2021-03-10 21:53:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:53:18,108 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 [2021-03-10 21:53:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:18,109 INFO L225 Difference]: With dead ends: 851 [2021-03-10 21:53:18,109 INFO L226 Difference]: Without dead ends: 847 [2021-03-10 21:53:18,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3304.6ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:53:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-03-10 21:53:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 757. [2021-03-10 21:53:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.732804232804233) internal successors, (2066), 756 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2066 transitions. [2021-03-10 21:53:18,119 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2066 transitions. Word has length 17 [2021-03-10 21:53:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:18,119 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2066 transitions. [2021-03-10 21:53:18,119 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) [2021-03-10 21:53:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2066 transitions. [2021-03-10 21:53:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:18,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:18,120 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:18,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-03-10 21:53:18,320 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:18,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1559039432, now seen corresponding path program 293 times [2021-03-10 21:53:18,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:18,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860789894] [2021-03-10 21:53:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860789894] [2021-03-10 21:53:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645080271] [2021-03-10 21:53:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:18,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:53:18,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:18,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:19,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:19,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:19,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,194 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 17 treesize of output 13 [2021-03-10 21:53:19,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,209 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 [2021-03-10 21:53:19,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:19,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,223 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 15 treesize of output 11 [2021-03-10 21:53:19,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:19,388 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:19,390 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:53:19,390 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:19,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:19,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:53:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:19,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:19,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:53:19,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635228815] [2021-03-10 21:53:19,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:19,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:19,666 INFO L87 Difference]: Start difference. First operand 757 states and 2066 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) [2021-03-10 21:53:20,108 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:53:20,711 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 21:53:20,945 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2021-03-10 21:53:21,439 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 21:53:21,896 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-03-10 21:53:22,167 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-03-10 21:53:22,502 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 21:53:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:22,584 INFO L93 Difference]: Finished difference Result 840 states and 2217 transitions. [2021-03-10 21:53:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:53:22,588 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 [2021-03-10 21:53:22,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:22,590 INFO L225 Difference]: With dead ends: 840 [2021-03-10 21:53:22,590 INFO L226 Difference]: Without dead ends: 840 [2021-03-10 21:53:22,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2305.2ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:53:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-03-10 21:53:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 742. [2021-03-10 21:53:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.7287449392712553) internal successors, (2022), 741 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2022 transitions. [2021-03-10 21:53:22,598 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2022 transitions. Word has length 17 [2021-03-10 21:53:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:22,598 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2022 transitions. [2021-03-10 21:53:22,598 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) [2021-03-10 21:53:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2022 transitions. [2021-03-10 21:53:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:22,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:22,599 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:22,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2031,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:22,800 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash -200351686, now seen corresponding path program 294 times [2021-03-10 21:53:22,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:22,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501928622] [2021-03-10 21:53:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:23,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501928622] [2021-03-10 21:53:23,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637553464] [2021-03-10 21:53:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:23,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:53:23,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:23,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:23,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,813 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 16 treesize of output 12 [2021-03-10 21:53:23,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:23,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,843 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 [2021-03-10 21:53:23,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:23,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:23,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:24,033 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:24,035 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:53:24,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:24,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:24,038 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:53:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:24,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:24,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:24,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169289406] [2021-03-10 21:53:24,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:24,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:24,311 INFO L87 Difference]: Start difference. First operand 742 states and 2022 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) [2021-03-10 21:53:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:26,472 INFO L93 Difference]: Finished difference Result 910 states and 2340 transitions. [2021-03-10 21:53:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:53:26,475 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 [2021-03-10 21:53:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:26,476 INFO L225 Difference]: With dead ends: 910 [2021-03-10 21:53:26,476 INFO L226 Difference]: Without dead ends: 910 [2021-03-10 21:53:26,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2112.5ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-03-10 21:53:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 757. [2021-03-10 21:53:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.744708994708995) internal successors, (2075), 756 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) [2021-03-10 21:53:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2075 transitions. [2021-03-10 21:53:26,485 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2075 transitions. Word has length 17 [2021-03-10 21:53:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:26,485 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2075 transitions. [2021-03-10 21:53:26,485 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) [2021-03-10 21:53:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2075 transitions. [2021-03-10 21:53:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:26,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:26,486 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:26,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2035 [2021-03-10 21:53:26,686 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:26,686 INFO L82 PathProgramCache]: Analyzing trace with hash 601264542, now seen corresponding path program 295 times [2021-03-10 21:53:26,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:26,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172490989] [2021-03-10 21:53:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172490989] [2021-03-10 21:53:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785522631] [2021-03-10 21:53:27,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:27,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:27,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:27,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:27,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:27,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,953 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:27,955 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:53:27,955 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:27,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:27,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:53:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:28,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:28,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:28,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994389482] [2021-03-10 21:53:28,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:28,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:28,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:28,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:28,272 INFO L87 Difference]: Start difference. First operand 757 states and 2075 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) [2021-03-10 21:53:29,372 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 21:53:29,939 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:53:30,518 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:53:30,929 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:53:31,300 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 21:53:31,641 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:53:32,079 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:53:32,379 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:53:32,820 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:53:33,156 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:53:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:33,963 INFO L93 Difference]: Finished difference Result 915 states and 2343 transitions. [2021-03-10 21:53:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:53:33,968 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 [2021-03-10 21:53:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:33,969 INFO L225 Difference]: With dead ends: 915 [2021-03-10 21:53:33,969 INFO L226 Difference]: Without dead ends: 905 [2021-03-10 21:53:33,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4574.6ms TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:53:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-03-10 21:53:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 767. [2021-03-10 21:53:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.740208877284595) internal successors, (2099), 766 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2099 transitions. [2021-03-10 21:53:33,979 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2099 transitions. Word has length 17 [2021-03-10 21:53:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:33,979 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2099 transitions. [2021-03-10 21:53:33,979 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) [2021-03-10 21:53:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2099 transitions. [2021-03-10 21:53:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:33,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:33,980 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:34,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-03-10 21:53:34,195 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1975359048, now seen corresponding path program 296 times [2021-03-10 21:53:34,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:34,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894030025] [2021-03-10 21:53:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:34,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894030025] [2021-03-10 21:53:34,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158673124] [2021-03-10 21:53:34,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:34,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:35,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:35,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,260 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 17 treesize of output 13 [2021-03-10 21:53:35,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:35,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:35,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:35,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:35,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:35,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:35,467 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:35,468 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:53:35,468 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:35,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:35,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:53:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:35,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:35,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:35,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380873254] [2021-03-10 21:53:35,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:35,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:35,722 INFO L87 Difference]: Start difference. First operand 767 states and 2099 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) [2021-03-10 21:53:36,629 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-10 21:53:37,119 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:53:37,513 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 21:53:37,672 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:53:38,228 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 21:53:38,531 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 21:53:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:38,566 INFO L93 Difference]: Finished difference Result 898 states and 2326 transitions. [2021-03-10 21:53:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:53:38,570 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 [2021-03-10 21:53:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:38,571 INFO L225 Difference]: With dead ends: 898 [2021-03-10 21:53:38,571 INFO L226 Difference]: Without dead ends: 898 [2021-03-10 21:53:38,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2631.1ms TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:53:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-03-10 21:53:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 764. [2021-03-10 21:53:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.7339449541284404) internal successors, (2086), 763 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2086 transitions. [2021-03-10 21:53:38,581 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2086 transitions. Word has length 17 [2021-03-10 21:53:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:38,581 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2086 transitions. [2021-03-10 21:53:38,581 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) [2021-03-10 21:53:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2086 transitions. [2021-03-10 21:53:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:38,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:38,582 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:38,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-03-10 21:53:38,782 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash 608994940, now seen corresponding path program 297 times [2021-03-10 21:53:38,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:38,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693538405] [2021-03-10 21:53:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693538405] [2021-03-10 21:53:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580913037] [2021-03-10 21:53:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:39,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:39,863 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 16 treesize of output 12 [2021-03-10 21:53:39,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:39,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:39,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,969 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:53:39,969 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:39,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,972 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:53:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:40,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:40,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:40,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109943231] [2021-03-10 21:53:40,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:40,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:40,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:40,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:40,105 INFO L87 Difference]: Start difference. First operand 764 states and 2086 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) [2021-03-10 21:53:41,087 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:53:41,662 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 21:53:42,500 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 21:53:43,285 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:53:43,569 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:53:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:44,029 INFO L93 Difference]: Finished difference Result 946 states and 2414 transitions. [2021-03-10 21:53:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:53:44,034 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 [2021-03-10 21:53:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:44,035 INFO L225 Difference]: With dead ends: 946 [2021-03-10 21:53:44,035 INFO L226 Difference]: Without dead ends: 946 [2021-03-10 21:53:44,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3083.7ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:53:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-03-10 21:53:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 763. [2021-03-10 21:53:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.7335958005249346) internal successors, (2083), 762 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2083 transitions. [2021-03-10 21:53:44,044 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2083 transitions. Word has length 17 [2021-03-10 21:53:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:44,044 INFO L480 AbstractCegarLoop]: Abstraction has 763 states and 2083 transitions. [2021-03-10 21:53:44,044 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) [2021-03-10 21:53:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2083 transitions. [2021-03-10 21:53:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:44,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:44,045 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:44,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2049 [2021-03-10 21:53:44,245 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash -880410056, now seen corresponding path program 298 times [2021-03-10 21:53:44,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:44,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046255132] [2021-03-10 21:53:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046255132] [2021-03-10 21:53:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528594768] [2021-03-10 21:53:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:44,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:44,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,249 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 16 treesize of output 12 [2021-03-10 21:53:45,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:45,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,354 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:53:45,354 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:45,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,357 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:53:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:45,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:45,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:45,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626414050] [2021-03-10 21:53:45,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:45,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:45,485 INFO L87 Difference]: Start difference. First operand 763 states and 2083 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) [2021-03-10 21:53:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:47,260 INFO L93 Difference]: Finished difference Result 888 states and 2300 transitions. [2021-03-10 21:53:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:53:47,264 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 [2021-03-10 21:53:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:47,265 INFO L225 Difference]: With dead ends: 888 [2021-03-10 21:53:47,265 INFO L226 Difference]: Without dead ends: 888 [2021-03-10 21:53:47,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1165.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:53:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-03-10 21:53:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 740. [2021-03-10 21:53:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.711772665764547) internal successors, (2004), 739 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2004 transitions. [2021-03-10 21:53:47,274 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2004 transitions. Word has length 17 [2021-03-10 21:53:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:47,274 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 2004 transitions. [2021-03-10 21:53:47,275 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) [2021-03-10 21:53:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2004 transitions. [2021-03-10 21:53:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:47,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:47,276 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:47,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:47,476 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1644528860, now seen corresponding path program 299 times [2021-03-10 21:53:47,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:47,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385474411] [2021-03-10 21:53:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385474411] [2021-03-10 21:53:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63706916] [2021-03-10 21:53:47,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:47,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:53:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:47,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:48,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:48,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:48,436 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 [2021-03-10 21:53:48,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:48,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:48,566 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:53:48,568 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:53:48,568 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:48,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:48,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:53:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:48,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:48,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:48,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733282796] [2021-03-10 21:53:48,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:48,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:48,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:48,690 INFO L87 Difference]: Start difference. First operand 740 states and 2004 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) [2021-03-10 21:53:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:50,375 INFO L93 Difference]: Finished difference Result 913 states and 2373 transitions. [2021-03-10 21:53:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:50,379 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 [2021-03-10 21:53:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:50,380 INFO L225 Difference]: With dead ends: 913 [2021-03-10 21:53:50,380 INFO L226 Difference]: Without dead ends: 913 [2021-03-10 21:53:50,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 792.4ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-03-10 21:53:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 805. [2021-03-10 21:53:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 2.7487562189054726) internal successors, (2210), 804 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) [2021-03-10 21:53:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2210 transitions. [2021-03-10 21:53:50,390 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2210 transitions. Word has length 17 [2021-03-10 21:53:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:50,390 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 2210 transitions. [2021-03-10 21:53:50,390 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) [2021-03-10 21:53:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2210 transitions. [2021-03-10 21:53:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:50,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:50,391 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:50,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2053,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:50,591 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash -713646272, now seen corresponding path program 300 times [2021-03-10 21:53:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:50,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110887859] [2021-03-10 21:53:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110887859] [2021-03-10 21:53:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103819081] [2021-03-10 21:53:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:51,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:53:51,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:51,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:52,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:52,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:52,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:52,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:52,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:53:52,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:52,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:53:52,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:53:52,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:52,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:52,069 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 17 treesize of output 13 [2021-03-10 21:53:52,076 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:53:52,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:52,266 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:53:52,268 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:53:52,268 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:52,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:53:52,272 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:53:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:52,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:52,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775429994] [2021-03-10 21:53:52,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:52,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:52,453 INFO L87 Difference]: Start difference. First operand 805 states and 2210 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) [2021-03-10 21:53:53,478 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 21:53:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:55,701 INFO L93 Difference]: Finished difference Result 894 states and 2325 transitions. [2021-03-10 21:53:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:53:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:53:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:55,706 INFO L225 Difference]: With dead ends: 894 [2021-03-10 21:53:55,706 INFO L226 Difference]: Without dead ends: 886 [2021-03-10 21:53:55,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2607.5ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:53:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-03-10 21:53:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 811. [2021-03-10 21:53:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.737037037037037) internal successors, (2217), 810 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) [2021-03-10 21:53:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2217 transitions. [2021-03-10 21:53:55,716 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2217 transitions. Word has length 17 [2021-03-10 21:53:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:55,716 INFO L480 AbstractCegarLoop]: Abstraction has 811 states and 2217 transitions. [2021-03-10 21:53:55,716 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) [2021-03-10 21:53:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2217 transitions. [2021-03-10 21:53:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:55,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:55,717 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:55,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-03-10 21:53:55,918 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:55,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1489416322, now seen corresponding path program 301 times [2021-03-10 21:53:55,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:55,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979872069] [2021-03-10 21:53:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979872069] [2021-03-10 21:53:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702833880] [2021-03-10 21:53:56,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:56,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:53:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:53:57,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:57,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,328 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:53:57,328 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:53:57,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:53:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:57,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:57,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:57,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166694902] [2021-03-10 21:53:57,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:57,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:57,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:57,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:57,384 INFO L87 Difference]: Start difference. First operand 811 states and 2217 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) [2021-03-10 21:53:58,461 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:53:59,022 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:53:59,689 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:53:59,976 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 21:54:00,280 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:54:00,696 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:54:01,196 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:54:01,549 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 21:54:01,951 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:54:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:02,372 INFO L93 Difference]: Finished difference Result 990 states and 2513 transitions. [2021-03-10 21:54:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:54:02,377 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 [2021-03-10 21:54:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:02,378 INFO L225 Difference]: With dead ends: 990 [2021-03-10 21:54:02,378 INFO L226 Difference]: Without dead ends: 990 [2021-03-10 21:54:02,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4337.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:54:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-03-10 21:54:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 805. [2021-03-10 21:54:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 2.7487562189054726) internal successors, (2210), 804 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) [2021-03-10 21:54:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2210 transitions. [2021-03-10 21:54:02,389 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2210 transitions. Word has length 17 [2021-03-10 21:54:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:02,389 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 2210 transitions. [2021-03-10 21:54:02,389 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) [2021-03-10 21:54:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2210 transitions. [2021-03-10 21:54:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:02,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:02,390 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:02,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2063,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:02,591 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1251501850, now seen corresponding path program 302 times [2021-03-10 21:54:02,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:02,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185986645] [2021-03-10 21:54:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:03,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185986645] [2021-03-10 21:54:03,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610523017] [2021-03-10 21:54:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:03,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:03,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:04,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:04,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:04,019 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 16 treesize of output 12 [2021-03-10 21:54:04,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:04,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:04,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:04,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:04,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:04,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:04,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:04,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:04,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:04,095 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:04,277 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:54:04,278 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:54:04,278 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:04,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:54:04,283 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:54:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:04,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:04,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:04,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631980616] [2021-03-10 21:54:04,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:04,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:04,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:04,475 INFO L87 Difference]: Start difference. First operand 805 states and 2210 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) [2021-03-10 21:54:04,911 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:05,786 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:54:06,591 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 21:54:07,404 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:54:08,189 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 21:54:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:08,352 INFO L93 Difference]: Finished difference Result 900 states and 2334 transitions. [2021-03-10 21:54:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:54:08,356 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 [2021-03-10 21:54:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:08,357 INFO L225 Difference]: With dead ends: 900 [2021-03-10 21:54:08,358 INFO L226 Difference]: Without dead ends: 894 [2021-03-10 21:54:08,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3437.3ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:54:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-03-10 21:54:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 808. [2021-03-10 21:54:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.7434944237918217) internal successors, (2214), 807 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2214 transitions. [2021-03-10 21:54:08,367 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2214 transitions. Word has length 17 [2021-03-10 21:54:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:08,367 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 2214 transitions. [2021-03-10 21:54:08,368 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) [2021-03-10 21:54:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2214 transitions. [2021-03-10 21:54:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:08,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:08,368 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:08,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2066,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:08,569 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1729058660, now seen corresponding path program 303 times [2021-03-10 21:54:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:08,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343376908] [2021-03-10 21:54:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343376908] [2021-03-10 21:54:09,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022299175] [2021-03-10 21:54:09,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:09,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:09,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:09,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,912 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 [2021-03-10 21:54:09,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,927 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 15 treesize of output 11 [2021-03-10 21:54:09,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:10,037 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:10,038 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:54:10,038 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:10,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:10,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:54:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:10,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:10,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008668743] [2021-03-10 21:54:10,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:10,168 INFO L87 Difference]: Start difference. First operand 808 states and 2214 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) [2021-03-10 21:54:10,677 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 21:54:11,542 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 21:54:12,133 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:54:12,563 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:54:13,249 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:54:14,105 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:54:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:14,530 INFO L93 Difference]: Finished difference Result 987 states and 2521 transitions. [2021-03-10 21:54:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:54:14,534 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 [2021-03-10 21:54:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:14,535 INFO L225 Difference]: With dead ends: 987 [2021-03-10 21:54:14,535 INFO L226 Difference]: Without dead ends: 987 [2021-03-10 21:54:14,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3624.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:54:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-03-10 21:54:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 807. [2021-03-10 21:54:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.7555831265508686) internal successors, (2221), 806 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2221 transitions. [2021-03-10 21:54:14,546 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2221 transitions. Word has length 17 [2021-03-10 21:54:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:14,546 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 2221 transitions. [2021-03-10 21:54:14,546 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) [2021-03-10 21:54:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2221 transitions. [2021-03-10 21:54:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:14,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:14,548 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:14,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2073,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:14,748 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash 809357952, now seen corresponding path program 304 times [2021-03-10 21:54:14,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:14,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292989865] [2021-03-10 21:54:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292989865] [2021-03-10 21:54:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000096646] [2021-03-10 21:54:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:15,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:16,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:16,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:16,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:16,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,275 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 17 treesize of output 13 [2021-03-10 21:54:16,282 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:16,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,500 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:54:16,501 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:54:16,502 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:16,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:54:16,507 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:54:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:16,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:16,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:16,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041571985] [2021-03-10 21:54:16,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:16,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:16,679 INFO L87 Difference]: Start difference. First operand 807 states and 2221 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) [2021-03-10 21:54:17,101 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:17,336 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:17,606 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 21:54:18,632 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:54:19,440 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 21:54:19,682 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 21:54:19,963 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:54:20,277 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 21:54:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:20,812 INFO L93 Difference]: Finished difference Result 875 states and 2314 transitions. [2021-03-10 21:54:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:54:20,816 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 [2021-03-10 21:54:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:20,818 INFO L225 Difference]: With dead ends: 875 [2021-03-10 21:54:20,818 INFO L226 Difference]: Without dead ends: 871 [2021-03-10 21:54:20,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3472.0ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:54:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-03-10 21:54:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 808. [2021-03-10 21:54:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.7534076827757126) internal successors, (2222), 807 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2222 transitions. [2021-03-10 21:54:20,828 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2222 transitions. Word has length 17 [2021-03-10 21:54:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:20,828 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 2222 transitions. [2021-03-10 21:54:20,829 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) [2021-03-10 21:54:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2222 transitions. [2021-03-10 21:54:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:20,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:20,830 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:21,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2076,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:21,030 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1736789058, now seen corresponding path program 305 times [2021-03-10 21:54:21,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:21,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868975835] [2021-03-10 21:54:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868975835] [2021-03-10 21:54:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915374830] [2021-03-10 21:54:21,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:21,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:21,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:22,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:22,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:22,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,392 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 [2021-03-10 21:54:22,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,573 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:22,574 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:54:22,575 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:22,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:22,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:54:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:22,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:22,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:22,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710226845] [2021-03-10 21:54:22,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:22,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:22,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:22,875 INFO L87 Difference]: Start difference. First operand 808 states and 2222 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) [2021-03-10 21:54:23,336 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 21:54:23,738 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:54:24,043 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 21:54:24,601 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:54:24,911 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:54:25,372 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:54:25,799 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:54:26,085 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 21:54:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:26,522 INFO L93 Difference]: Finished difference Result 976 states and 2449 transitions. [2021-03-10 21:54:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:54:26,526 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 [2021-03-10 21:54:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:26,528 INFO L225 Difference]: With dead ends: 976 [2021-03-10 21:54:26,528 INFO L226 Difference]: Without dead ends: 975 [2021-03-10 21:54:26,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3305.7ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:54:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-03-10 21:54:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 778. [2021-03-10 21:54:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 2.716859716859717) internal successors, (2111), 777 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2111 transitions. [2021-03-10 21:54:26,538 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2111 transitions. Word has length 17 [2021-03-10 21:54:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:26,538 INFO L480 AbstractCegarLoop]: Abstraction has 778 states and 2111 transitions. [2021-03-10 21:54:26,539 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) [2021-03-10 21:54:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2111 transitions. [2021-03-10 21:54:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:26,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:26,540 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:26,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2083,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:26,740 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1756562010, now seen corresponding path program 306 times [2021-03-10 21:54:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:26,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445511849] [2021-03-10 21:54:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:27,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445511849] [2021-03-10 21:54:27,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737050231] [2021-03-10 21:54:27,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:27,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:54:27,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:27,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:27,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,017 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 [2021-03-10 21:54:28,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:28,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:28,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,063 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 15 treesize of output 11 [2021-03-10 21:54:28,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,244 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:28,245 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:54:28,245 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:28,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:28,249 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:54:28,596 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-03-10 21:54:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:28,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:28,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:28,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688194565] [2021-03-10 21:54:28,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:28,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:28,631 INFO L87 Difference]: Start difference. First operand 778 states and 2111 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) [2021-03-10 21:54:29,035 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:29,268 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:29,642 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 21:54:29,895 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2021-03-10 21:54:30,996 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:54:31,477 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:54:31,705 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:54:32,093 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-10 21:54:32,503 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2021-03-10 21:54:32,905 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:54:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:32,951 INFO L93 Difference]: Finished difference Result 872 states and 2262 transitions. [2021-03-10 21:54:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:54:32,956 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 [2021-03-10 21:54:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:32,958 INFO L225 Difference]: With dead ends: 872 [2021-03-10 21:54:32,958 INFO L226 Difference]: Without dead ends: 867 [2021-03-10 21:54:32,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3750.0ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:54:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-03-10 21:54:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 783. [2021-03-10 21:54:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 2.7186700767263425) internal successors, (2126), 782 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) [2021-03-10 21:54:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2126 transitions. [2021-03-10 21:54:32,968 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2126 transitions. Word has length 17 [2021-03-10 21:54:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:32,968 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 2126 transitions. [2021-03-10 21:54:32,968 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) [2021-03-10 21:54:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2126 transitions. [2021-03-10 21:54:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:32,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:32,970 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:33,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:33,170 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:33,170 INFO L82 PathProgramCache]: Analyzing trace with hash -38218304, now seen corresponding path program 307 times [2021-03-10 21:54:33,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:33,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546201700] [2021-03-10 21:54:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:33,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546201700] [2021-03-10 21:54:33,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926788839] [2021-03-10 21:54:33,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:33,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:34,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:34,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:34,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:34,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,495 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 16 treesize of output 12 [2021-03-10 21:54:34,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:34,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:34,708 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:34,708 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:54:34,709 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:34,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:34,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:54:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:35,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:35,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373232542] [2021-03-10 21:54:35,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:35,019 INFO L87 Difference]: Start difference. First operand 783 states and 2126 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) [2021-03-10 21:54:35,429 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:35,679 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:54:36,053 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 21:54:36,337 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 21:54:37,407 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-03-10 21:54:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:37,736 INFO L93 Difference]: Finished difference Result 861 states and 2246 transitions. [2021-03-10 21:54:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:54:37,740 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 [2021-03-10 21:54:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:37,741 INFO L225 Difference]: With dead ends: 861 [2021-03-10 21:54:37,741 INFO L226 Difference]: Without dead ends: 861 [2021-03-10 21:54:37,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2396.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:54:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-03-10 21:54:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 755. [2021-03-10 21:54:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.7108753315649867) internal successors, (2044), 754 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2044 transitions. [2021-03-10 21:54:37,750 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2044 transitions. Word has length 17 [2021-03-10 21:54:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:37,750 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2044 transitions. [2021-03-10 21:54:37,750 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) [2021-03-10 21:54:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2044 transitions. [2021-03-10 21:54:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:37,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:37,751 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:37,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2093 [2021-03-10 21:54:37,952 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2044748640, now seen corresponding path program 308 times [2021-03-10 21:54:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:37,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664235878] [2021-03-10 21:54:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:54:38,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664235878] [2021-03-10 21:54:38,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466570860] [2021-03-10 21:54:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:38,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:38,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:38,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,868 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 [2021-03-10 21:54:38,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:38,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,904 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 16 treesize of output 12 [2021-03-10 21:54:38,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:38,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:39,120 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:39,122 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:54:39,122 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:39,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:39,125 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:54:39,469 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-03-10 21:54:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:39,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:39,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:54:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855436647] [2021-03-10 21:54:39,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:39,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:39,521 INFO L87 Difference]: Start difference. First operand 755 states and 2044 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) [2021-03-10 21:54:39,951 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 21:54:40,155 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 21:54:40,634 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 21:54:40,939 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 21:54:41,769 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:54:42,097 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:54:42,376 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:54:42,575 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:54:42,823 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:54:43,134 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:54:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:43,194 INFO L93 Difference]: Finished difference Result 786 states and 2089 transitions. [2021-03-10 21:54:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:54:43,197 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 [2021-03-10 21:54:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:43,198 INFO L225 Difference]: With dead ends: 786 [2021-03-10 21:54:43,198 INFO L226 Difference]: Without dead ends: 782 [2021-03-10 21:54:43,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3409.8ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:54:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-03-10 21:54:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 731. [2021-03-10 21:54:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 2.710958904109589) internal successors, (1979), 730 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1979 transitions. [2021-03-10 21:54:43,205 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1979 transitions. Word has length 17 [2021-03-10 21:54:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:43,206 INFO L480 AbstractCegarLoop]: Abstraction has 731 states and 1979 transitions. [2021-03-10 21:54:43,206 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) [2021-03-10 21:54:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1979 transitions. [2021-03-10 21:54:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:43,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:43,206 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:43,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2097,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:43,407 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1683195326, now seen corresponding path program 309 times [2021-03-10 21:54:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:43,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617210110] [2021-03-10 21:54:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:43,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617210110] [2021-03-10 21:54:43,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006965381] [2021-03-10 21:54:43,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:43,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:44,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:44,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:44,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,718 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:44,720 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:54:44,720 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:44,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:54:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:44,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:44,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:54:44,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416315713] [2021-03-10 21:54:44,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:44,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:44,839 INFO L87 Difference]: Start difference. First operand 731 states and 1979 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) [2021-03-10 21:54:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:47,157 INFO L93 Difference]: Finished difference Result 871 states and 2253 transitions. [2021-03-10 21:54:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:47,162 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 [2021-03-10 21:54:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:47,163 INFO L225 Difference]: With dead ends: 871 [2021-03-10 21:54:47,163 INFO L226 Difference]: Without dead ends: 871 [2021-03-10 21:54:47,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 942.9ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-03-10 21:54:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 756. [2021-03-10 21:54:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.7218543046357615) internal successors, (2055), 755 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) [2021-03-10 21:54:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2055 transitions. [2021-03-10 21:54:47,173 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2055 transitions. Word has length 17 [2021-03-10 21:54:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:47,173 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 2055 transitions. [2021-03-10 21:54:47,173 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) [2021-03-10 21:54:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2055 transitions. [2021-03-10 21:54:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:47,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:47,174 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:47,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2102 [2021-03-10 21:54:47,374 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1057722846, now seen corresponding path program 310 times [2021-03-10 21:54:47,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:47,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308039794] [2021-03-10 21:54:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:47,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308039794] [2021-03-10 21:54:47,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743849031] [2021-03-10 21:54:47,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:47,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:48,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,668 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 [2021-03-10 21:54:48,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,683 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 8 treesize of output 6 [2021-03-10 21:54:48,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:48,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:48,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,734 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 17 treesize of output 13 [2021-03-10 21:54:48,741 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,749 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 [2021-03-10 21:54:48,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,951 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:54:48,952 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:54:48,952 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:48,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:54:48,957 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:54:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:49,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:49,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:54:49,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584553566] [2021-03-10 21:54:49,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:49,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:49,135 INFO L87 Difference]: Start difference. First operand 756 states and 2055 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) [2021-03-10 21:54:50,200 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:54:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:51,784 INFO L93 Difference]: Finished difference Result 822 states and 2143 transitions. [2021-03-10 21:54:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:54:51,788 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 [2021-03-10 21:54:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:51,790 INFO L225 Difference]: With dead ends: 822 [2021-03-10 21:54:51,790 INFO L226 Difference]: Without dead ends: 816 [2021-03-10 21:54:51,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2320.0ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:54:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-03-10 21:54:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 758. [2021-03-10 21:54:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.715984147952444) internal successors, (2056), 757 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) [2021-03-10 21:54:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2056 transitions. [2021-03-10 21:54:51,798 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2056 transitions. Word has length 17 [2021-03-10 21:54:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:51,798 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2056 transitions. [2021-03-10 21:54:51,799 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) [2021-03-10 21:54:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2056 transitions. [2021-03-10 21:54:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:51,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:51,800 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:52,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2105,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:52,000 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1922837664, now seen corresponding path program 311 times [2021-03-10 21:54:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:52,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373036199] [2021-03-10 21:54:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:52,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373036199] [2021-03-10 21:54:52,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548838926] [2021-03-10 21:54:52,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:52,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:53,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,424 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 [2021-03-10 21:54:53,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:53,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,576 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:54:53,578 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:54:53,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:53,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:54:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:53,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:53,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:54:53,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832516352] [2021-03-10 21:54:53,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:53,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:53,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:53,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:53,720 INFO L87 Difference]: Start difference. First operand 758 states and 2056 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) [2021-03-10 21:54:54,595 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:54:55,474 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:54:56,148 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:54:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:56,527 INFO L93 Difference]: Finished difference Result 876 states and 2258 transitions. [2021-03-10 21:54:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:54:56,532 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 [2021-03-10 21:54:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:56,533 INFO L225 Difference]: With dead ends: 876 [2021-03-10 21:54:56,533 INFO L226 Difference]: Without dead ends: 876 [2021-03-10 21:54:56,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2533.7ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:54:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-03-10 21:54:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 753. [2021-03-10 21:54:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.720744680851064) internal successors, (2046), 752 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) [2021-03-10 21:54:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2046 transitions. [2021-03-10 21:54:56,541 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2046 transitions. Word has length 17 [2021-03-10 21:54:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:56,542 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2046 transitions. [2021-03-10 21:54:56,542 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) [2021-03-10 21:54:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2046 transitions. [2021-03-10 21:54:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:56,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:56,543 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:56,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-03-10 21:54:56,743 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:56,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1003136956, now seen corresponding path program 312 times [2021-03-10 21:54:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420871191] [2021-03-10 21:54:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:57,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420871191] [2021-03-10 21:54:57,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88245522] [2021-03-10 21:54:57,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:57,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:54:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:57,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:54:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:58,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:58,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:58,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:54:58,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:58,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:54:58,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,128 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 [2021-03-10 21:54:58,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:58,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:58,146 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 [2021-03-10 21:54:58,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:58,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,363 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:54:58,364 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:54:58,364 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:54:58,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:54:58,369 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:54:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:58,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:58,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:54:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861466757] [2021-03-10 21:54:58,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:58,543 INFO L87 Difference]: Start difference. First operand 753 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) [2021-03-10 21:54:58,883 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 21:54:59,342 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:55:00,144 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:55:00,967 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 21:55:01,242 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 21:55:01,843 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 21:55:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:02,181 INFO L93 Difference]: Finished difference Result 814 states and 2133 transitions. [2021-03-10 21:55:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:55:02,186 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 [2021-03-10 21:55:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:02,188 INFO L225 Difference]: With dead ends: 814 [2021-03-10 21:55:02,188 INFO L226 Difference]: Without dead ends: 810 [2021-03-10 21:55:02,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3050.1ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:55:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-03-10 21:55:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 754. [2021-03-10 21:55:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.7184594953519254) internal successors, (2047), 753 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) [2021-03-10 21:55:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2047 transitions. [2021-03-10 21:55:02,197 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2047 transitions. Word has length 17 [2021-03-10 21:55:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:02,197 INFO L480 AbstractCegarLoop]: Abstraction has 754 states and 2047 transitions. [2021-03-10 21:55:02,197 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) [2021-03-10 21:55:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2047 transitions. [2021-03-10 21:55:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:02,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:02,198 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:02,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2115 [2021-03-10 21:55:02,399 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:02,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1930568062, now seen corresponding path program 313 times [2021-03-10 21:55:02,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:02,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926985634] [2021-03-10 21:55:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926985634] [2021-03-10 21:55:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800836465] [2021-03-10 21:55:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:03,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:03,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,659 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 [2021-03-10 21:55:03,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:03,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,873 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:03,875 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:03,875 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:03,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:03,878 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:04,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:04,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:55:04,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280190066] [2021-03-10 21:55:04,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:04,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:04,196 INFO L87 Difference]: Start difference. First operand 754 states and 2047 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) [2021-03-10 21:55:04,733 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 21:55:04,972 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:55:06,523 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 21:55:06,945 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:55:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:07,283 INFO L93 Difference]: Finished difference Result 917 states and 2303 transitions. [2021-03-10 21:55:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:55:07,285 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 [2021-03-10 21:55:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:07,286 INFO L225 Difference]: With dead ends: 917 [2021-03-10 21:55:07,286 INFO L226 Difference]: Without dead ends: 917 [2021-03-10 21:55:07,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2579.1ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:55:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-03-10 21:55:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 750. [2021-03-10 21:55:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.7142857142857144) internal successors, (2033), 749 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2033 transitions. [2021-03-10 21:55:07,293 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2033 transitions. Word has length 17 [2021-03-10 21:55:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:07,294 INFO L480 AbstractCegarLoop]: Abstraction has 750 states and 2033 transitions. [2021-03-10 21:55:07,294 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) [2021-03-10 21:55:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2033 transitions. [2021-03-10 21:55:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:07,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:07,294 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:07,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2122 [2021-03-10 21:55:07,495 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1562783006, now seen corresponding path program 314 times [2021-03-10 21:55:07,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:07,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529255015] [2021-03-10 21:55:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:07,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529255015] [2021-03-10 21:55:07,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702497341] [2021-03-10 21:55:07,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:07,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:07,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:07,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:08,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:08,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,708 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 [2021-03-10 21:55:08,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:08,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,924 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:08,926 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:08,926 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:08,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:08,930 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:09,317 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-03-10 21:55:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:09,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:09,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:55:09,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029928565] [2021-03-10 21:55:09,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:09,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:09,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:09,363 INFO L87 Difference]: Start difference. First operand 750 states and 2033 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) [2021-03-10 21:55:10,420 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:55:10,758 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2021-03-10 21:55:11,372 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-03-10 21:55:11,939 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:55:12,205 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:55:12,397 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-03-10 21:55:12,832 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-10 21:55:13,523 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:55:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:13,678 INFO L93 Difference]: Finished difference Result 864 states and 2216 transitions. [2021-03-10 21:55:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:55:13,683 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 [2021-03-10 21:55:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:13,684 INFO L225 Difference]: With dead ends: 864 [2021-03-10 21:55:13,684 INFO L226 Difference]: Without dead ends: 860 [2021-03-10 21:55:13,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 3878.9ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:55:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-03-10 21:55:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 753. [2021-03-10 21:55:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.7154255319148937) internal successors, (2042), 752 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2042 transitions. [2021-03-10 21:55:13,693 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2042 transitions. Word has length 17 [2021-03-10 21:55:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:13,693 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2042 transitions. [2021-03-10 21:55:13,693 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) [2021-03-10 21:55:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2042 transitions. [2021-03-10 21:55:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:13,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:13,694 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:13,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2126 [2021-03-10 21:55:13,896 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash 155560700, now seen corresponding path program 315 times [2021-03-10 21:55:13,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:13,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474744336] [2021-03-10 21:55:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474744336] [2021-03-10 21:55:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177909135] [2021-03-10 21:55:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:14,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:14,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,873 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 [2021-03-10 21:55:14,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,890 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 17 treesize of output 13 [2021-03-10 21:55:14,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:14,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:14,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:15,127 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:15,128 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:15,128 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:15,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:15,132 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:15,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:15,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:55:15,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717512188] [2021-03-10 21:55:15,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:15,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:15,467 INFO L87 Difference]: Start difference. First operand 753 states and 2042 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) [2021-03-10 21:55:15,786 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 21:55:16,332 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 13 [2021-03-10 21:55:16,505 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:55:16,822 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-03-10 21:55:17,341 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2021-03-10 21:55:17,756 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2021-03-10 21:55:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:17,838 INFO L93 Difference]: Finished difference Result 852 states and 2203 transitions. [2021-03-10 21:55:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:55:17,841 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 [2021-03-10 21:55:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:17,842 INFO L225 Difference]: With dead ends: 852 [2021-03-10 21:55:17,843 INFO L226 Difference]: Without dead ends: 852 [2021-03-10 21:55:17,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2166.9ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-03-10 21:55:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 737. [2021-03-10 21:55:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.707880434782609) internal successors, (1993), 736 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) [2021-03-10 21:55:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1993 transitions. [2021-03-10 21:55:17,852 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1993 transitions. Word has length 17 [2021-03-10 21:55:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:17,852 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 1993 transitions. [2021-03-10 21:55:17,852 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) [2021-03-10 21:55:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1993 transitions. [2021-03-10 21:55:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:17,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:17,853 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:18,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:18,054 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:18,054 INFO L82 PathProgramCache]: Analyzing trace with hash 316207332, now seen corresponding path program 316 times [2021-03-10 21:55:18,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:18,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191805325] [2021-03-10 21:55:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:55:18,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191805325] [2021-03-10 21:55:18,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967052734] [2021-03-10 21:55:18,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:18,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:18,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:19,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,013 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 [2021-03-10 21:55:19,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:19,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:19,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:19,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:19,064 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 [2021-03-10 21:55:19,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:19,271 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:19,272 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:19,273 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:19,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:19,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:19,673 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-03-10 21:55:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:19,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:19,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964778056] [2021-03-10 21:55:19,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:19,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:19,726 INFO L87 Difference]: Start difference. First operand 737 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) [2021-03-10 21:55:20,210 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 21:55:21,541 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:55:22,123 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:55:22,404 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:55:22,658 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:55:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:22,788 INFO L93 Difference]: Finished difference Result 787 states and 2076 transitions. [2021-03-10 21:55:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:55:22,793 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 [2021-03-10 21:55:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:22,795 INFO L225 Difference]: With dead ends: 787 [2021-03-10 21:55:22,795 INFO L226 Difference]: Without dead ends: 783 [2021-03-10 21:55:22,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2947.6ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:55:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-03-10 21:55:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 734. [2021-03-10 21:55:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.708049113233288) internal successors, (1985), 733 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1985 transitions. [2021-03-10 21:55:22,803 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1985 transitions. Word has length 17 [2021-03-10 21:55:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:22,803 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 1985 transitions. [2021-03-10 21:55:22,803 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) [2021-03-10 21:55:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1985 transitions. [2021-03-10 21:55:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:22,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:22,804 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:23,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2136,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:23,004 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:23,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1950236700, now seen corresponding path program 317 times [2021-03-10 21:55:23,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:23,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453284368] [2021-03-10 21:55:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453284368] [2021-03-10 21:55:23,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620616994] [2021-03-10 21:55:23,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:23,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:55:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:24,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:24,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:24,142 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 15 treesize of output 11 [2021-03-10 21:55:24,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:24,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:24,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:24,285 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:24,286 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-03-10 21:55:24,286 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:24,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:55:24,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-03-10 21:55:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:24,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:24,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519886728] [2021-03-10 21:55:24,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:24,415 INFO L87 Difference]: Start difference. First operand 734 states and 1985 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) [2021-03-10 21:55:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:26,274 INFO L93 Difference]: Finished difference Result 848 states and 2203 transitions. [2021-03-10 21:55:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:26,278 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 [2021-03-10 21:55:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:26,280 INFO L225 Difference]: With dead ends: 848 [2021-03-10 21:55:26,280 INFO L226 Difference]: Without dead ends: 848 [2021-03-10 21:55:26,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-03-10 21:55:26,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 749. [2021-03-10 21:55:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.72192513368984) internal successors, (2036), 748 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2036 transitions. [2021-03-10 21:55:26,289 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2036 transitions. Word has length 17 [2021-03-10 21:55:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:26,289 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 2036 transitions. [2021-03-10 21:55:26,289 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) [2021-03-10 21:55:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2036 transitions. [2021-03-10 21:55:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:26,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:26,290 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:26,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:26,490 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1425029888, now seen corresponding path program 318 times [2021-03-10 21:55:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:26,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199668612] [2021-03-10 21:55:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:26,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199668612] [2021-03-10 21:55:26,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801391920] [2021-03-10 21:55:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:26,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:55:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:55:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:27,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:27,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:55:27,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-03-10 21:55:27,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:55:27,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,798 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 [2021-03-10 21:55:27,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:55:27,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:28,040 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:55:28,042 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-03-10 21:55:28,042 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:28,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:55:28,048 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-03-10 21:55:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:28,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:28,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:28,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553994181] [2021-03-10 21:55:28,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:28,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:28,225 INFO L87 Difference]: Start difference. First operand 749 states and 2036 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) [2021-03-10 21:55:29,724 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:55:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:31,065 INFO L93 Difference]: Finished difference Result 808 states and 2120 transitions. [2021-03-10 21:55:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:55:31,068 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 [2021-03-10 21:55:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:31,069 INFO L225 Difference]: With dead ends: 808 [2021-03-10 21:55:31,069 INFO L226 Difference]: Without dead ends: 804 [2021-03-10 21:55:31,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2046.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-03-10 21:55:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 749. [2021-03-10 21:55:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.7192513368983957) internal successors, (2034), 748 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2034 transitions. [2021-03-10 21:55:31,076 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2034 transitions. Word has length 17 [2021-03-10 21:55:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:31,076 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 2034 transitions. [2021-03-10 21:55:31,076 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) [2021-03-10 21:55:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2034 transitions. [2021-03-10 21:55:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:31,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:31,077 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:31,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2144 [2021-03-10 21:55:31,295 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1942506302, now seen corresponding path program 319 times [2021-03-10 21:55:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:31,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6746700] [2021-03-10 21:55:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:31,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6746700] [2021-03-10 21:55:31,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741066429] [2021-03-10 21:55:31,717 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:32,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:32,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:32,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:32,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:32,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:32,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:32,628 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:32,630 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:32,630 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:32,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:32,633 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:32,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:32,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:32,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779773208] [2021-03-10 21:55:32,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:32,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:32,966 INFO L87 Difference]: Start difference. First operand 749 states and 2034 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) [2021-03-10 21:55:33,475 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 21:55:34,603 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:55:34,948 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:55:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:35,128 INFO L93 Difference]: Finished difference Result 863 states and 2213 transitions. [2021-03-10 21:55:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:35,133 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 [2021-03-10 21:55:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:35,134 INFO L225 Difference]: With dead ends: 863 [2021-03-10 21:55:35,134 INFO L226 Difference]: Without dead ends: 862 [2021-03-10 21:55:35,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1827.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:55:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-03-10 21:55:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 750. [2021-03-10 21:55:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.7209612817089455) internal successors, (2038), 749 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2038 transitions. [2021-03-10 21:55:35,143 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2038 transitions. Word has length 17 [2021-03-10 21:55:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:35,143 INFO L480 AbstractCegarLoop]: Abstraction has 750 states and 2038 transitions. [2021-03-10 21:55:35,143 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) [2021-03-10 21:55:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2038 transitions. [2021-03-10 21:55:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:35,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:35,144 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:35,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2151 [2021-03-10 21:55:35,345 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1140890074, now seen corresponding path program 320 times [2021-03-10 21:55:35,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:35,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089244667] [2021-03-10 21:55:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089244667] [2021-03-10 21:55:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529984035] [2021-03-10 21:55:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:35,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:35,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:36,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:36,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:36,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:36,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,389 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 [2021-03-10 21:55:36,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:36,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:36,620 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:36,622 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:36,622 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:36,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:36,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:36,974 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-03-10 21:55:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:37,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:37,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921597369] [2021-03-10 21:55:37,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:37,018 INFO L87 Difference]: Start difference. First operand 750 states and 2038 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) [2021-03-10 21:55:37,695 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:55:38,583 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:55:39,340 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:55:39,987 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-03-10 21:55:40,672 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2021-03-10 21:55:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:40,900 INFO L93 Difference]: Finished difference Result 840 states and 2185 transitions. [2021-03-10 21:55:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:55:40,904 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 [2021-03-10 21:55:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:40,906 INFO L225 Difference]: With dead ends: 840 [2021-03-10 21:55:40,906 INFO L226 Difference]: Without dead ends: 836 [2021-03-10 21:55:40,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2846.0ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:55:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-03-10 21:55:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 754. [2021-03-10 21:55:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.7237715803452853) internal successors, (2051), 753 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2051 transitions. [2021-03-10 21:55:40,915 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2051 transitions. Word has length 17 [2021-03-10 21:55:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:40,915 INFO L480 AbstractCegarLoop]: Abstraction has 754 states and 2051 transitions. [2021-03-10 21:55:40,915 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) [2021-03-10 21:55:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2051 transitions. [2021-03-10 21:55:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:40,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:40,916 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:41,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-03-10 21:55:41,117 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash 577453632, now seen corresponding path program 321 times [2021-03-10 21:55:41,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:41,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195580143] [2021-03-10 21:55:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195580143] [2021-03-10 21:55:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406776265] [2021-03-10 21:55:41,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:41,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:41,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:42,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:42,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,265 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 [2021-03-10 21:55:42,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:42,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:42,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,528 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:42,530 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:42,530 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:42,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:42,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:42,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:42,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:42,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350353027] [2021-03-10 21:55:42,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:42,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:42,862 INFO L87 Difference]: Start difference. First operand 754 states and 2051 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) [2021-03-10 21:55:44,370 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-03-10 21:55:44,746 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 16 [2021-03-10 21:55:45,159 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 21:55:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:45,164 INFO L93 Difference]: Finished difference Result 827 states and 2164 transitions. [2021-03-10 21:55:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:45,168 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 [2021-03-10 21:55:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:45,169 INFO L225 Difference]: With dead ends: 827 [2021-03-10 21:55:45,169 INFO L226 Difference]: Without dead ends: 827 [2021-03-10 21:55:45,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1767.4ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-03-10 21:55:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 737. [2021-03-10 21:55:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.7092391304347827) internal successors, (1994), 736 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1994 transitions. [2021-03-10 21:55:45,178 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1994 transitions. Word has length 17 [2021-03-10 21:55:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:45,178 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 1994 transitions. [2021-03-10 21:55:45,178 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) [2021-03-10 21:55:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1994 transitions. [2021-03-10 21:55:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:45,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:45,179 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:45,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2161 [2021-03-10 21:55:45,379 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:45,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1824390112, now seen corresponding path program 322 times [2021-03-10 21:55:45,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:45,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535722568] [2021-03-10 21:55:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:45,688 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-10 21:55:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:55:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535722568] [2021-03-10 21:55:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984022545] [2021-03-10 21:55:45,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:45,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:45,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:46,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,497 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 [2021-03-10 21:55:46,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:46,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:46,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:46,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:46,530 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 [2021-03-10 21:55:46,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:46,730 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:46,732 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:46,732 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:46,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:46,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:47,138 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-03-10 21:55:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:47,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:47,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718187611] [2021-03-10 21:55:47,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:47,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:47,200 INFO L87 Difference]: Start difference. First operand 737 states and 1994 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) [2021-03-10 21:55:47,670 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:55:48,710 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:55:49,356 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:55:49,591 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:55:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:49,850 INFO L93 Difference]: Finished difference Result 816 states and 2127 transitions. [2021-03-10 21:55:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:55:49,855 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 [2021-03-10 21:55:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:49,856 INFO L225 Difference]: With dead ends: 816 [2021-03-10 21:55:49,856 INFO L226 Difference]: Without dead ends: 812 [2021-03-10 21:55:49,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2783.5ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-10 21:55:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 742. [2021-03-10 21:55:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.709851551956815) internal successors, (2008), 741 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2008 transitions. [2021-03-10 21:55:49,865 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2008 transitions. Word has length 17 [2021-03-10 21:55:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:49,865 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2008 transitions. [2021-03-10 21:55:49,865 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) [2021-03-10 21:55:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2008 transitions. [2021-03-10 21:55:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:49,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:49,866 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:50,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2165,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:50,067 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash -95342778, now seen corresponding path program 323 times [2021-03-10 21:55:50,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:50,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018854233] [2021-03-10 21:55:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:50,350 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-10 21:55:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:55:50,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018854233] [2021-03-10 21:55:50,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710123377] [2021-03-10 21:55:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:50,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:55:50,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:51,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:51,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:51,223 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 [2021-03-10 21:55:51,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:55:51,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,259 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 [2021-03-10 21:55:51,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,282 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 [2021-03-10 21:55:51,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,303 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 [2021-03-10 21:55:51,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:51,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:51,329 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,552 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2021-03-10 21:55:51,554 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-03-10 21:55:51,554 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:51,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:55:51,557 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-03-10 21:55:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:51,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:51,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:55:51,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085250735] [2021-03-10 21:55:51,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:51,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:51,768 INFO L87 Difference]: Start difference. First operand 742 states and 2008 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) [2021-03-10 21:55:53,146 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 21:55:53,594 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 21:55:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:53,876 INFO L93 Difference]: Finished difference Result 781 states and 2065 transitions. [2021-03-10 21:55:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:53,880 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 [2021-03-10 21:55:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:53,882 INFO L225 Difference]: With dead ends: 781 [2021-03-10 21:55:53,882 INFO L226 Difference]: Without dead ends: 773 [2021-03-10 21:55:53,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1947.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-03-10 21:55:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 742. [2021-03-10 21:55:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.7017543859649122) internal successors, (2002), 741 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2002 transitions. [2021-03-10 21:55:53,890 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2002 transitions. Word has length 17 [2021-03-10 21:55:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:53,890 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2002 transitions. [2021-03-10 21:55:53,890 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) [2021-03-10 21:55:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2002 transitions. [2021-03-10 21:55:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:53,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:53,891 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:54,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2170,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:54,092 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash 842049790, now seen corresponding path program 324 times [2021-03-10 21:55:54,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:54,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440942017] [2021-03-10 21:55:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440942017] [2021-03-10 21:55:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933148031] [2021-03-10 21:55:54,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:54,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:55:54,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:55,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:55,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,300 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 17 treesize of output 13 [2021-03-10 21:55:55,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:55,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:55,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,546 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:55:55,548 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:55:55,548 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:55:55,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:55,551 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:55:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:55,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:55,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:55,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257122235] [2021-03-10 21:55:55,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:55,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:55,891 INFO L87 Difference]: Start difference. First operand 742 states and 2002 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) [2021-03-10 21:55:57,776 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:55:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:58,144 INFO L93 Difference]: Finished difference Result 865 states and 2218 transitions. [2021-03-10 21:55:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:55:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:55:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:58,151 INFO L225 Difference]: With dead ends: 865 [2021-03-10 21:55:58,151 INFO L226 Difference]: Without dead ends: 865 [2021-03-10 21:55:58,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1926.5ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-03-10 21:55:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 752. [2021-03-10 21:55:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.711051930758988) internal successors, (2036), 751 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2036 transitions. [2021-03-10 21:55:58,161 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2036 transitions. Word has length 17 [2021-03-10 21:55:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:58,161 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 2036 transitions. [2021-03-10 21:55:58,161 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) [2021-03-10 21:55:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2036 transitions. [2021-03-10 21:55:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:58,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:58,162 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:58,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2174,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:58,362 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:58,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1643666018, now seen corresponding path program 325 times [2021-03-10 21:55:58,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:58,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735580688] [2021-03-10 21:55:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:58,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735580688] [2021-03-10 21:55:58,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290452479] [2021-03-10 21:55:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:55:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:59,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:59,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:59,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:59,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:59,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:55:59,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:59,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:59,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:00,008 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:56:00,009 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:56:00,009 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:00,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:00,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:56:00,396 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-03-10 21:56:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:00,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:00,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:00,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328405168] [2021-03-10 21:56:00,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:00,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:00,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:00,442 INFO L87 Difference]: Start difference. First operand 752 states and 2036 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) [2021-03-10 21:56:01,677 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 21:56:02,058 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:56:02,452 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 21:56:02,818 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:56:03,176 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:56:03,652 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 21:56:03,940 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 21:56:04,569 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 21:56:05,029 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:56:05,244 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:56:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:05,642 INFO L93 Difference]: Finished difference Result 876 states and 2228 transitions. [2021-03-10 21:56:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:56:05,647 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 [2021-03-10 21:56:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:05,649 INFO L225 Difference]: With dead ends: 876 [2021-03-10 21:56:05,649 INFO L226 Difference]: Without dead ends: 866 [2021-03-10 21:56:05,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 4807.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:56:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-03-10 21:56:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 760. [2021-03-10 21:56:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.712779973649539) internal successors, (2059), 759 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2059 transitions. [2021-03-10 21:56:05,658 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2059 transitions. Word has length 17 [2021-03-10 21:56:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:05,659 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 2059 transitions. [2021-03-10 21:56:05,659 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) [2021-03-10 21:56:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2059 transitions. [2021-03-10 21:56:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:05,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:05,660 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:05,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-03-10 21:56:05,860 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash -932957572, now seen corresponding path program 326 times [2021-03-10 21:56:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:05,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715671329] [2021-03-10 21:56:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715671329] [2021-03-10 21:56:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26085038] [2021-03-10 21:56:06,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:06,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:06,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:56:06,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:07,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:56:07,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,113 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 17 treesize of output 13 [2021-03-10 21:56:07,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:07,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,128 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 [2021-03-10 21:56:07,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:07,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:56:07,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:07,301 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 21:56:07,303 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-03-10 21:56:07,303 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:07,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:07,306 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-03-10 21:56:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:07,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:07,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860670910] [2021-03-10 21:56:07,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:07,622 INFO L87 Difference]: Start difference. First operand 760 states and 2059 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) [2021-03-10 21:56:08,493 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 21:56:08,833 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:09,172 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:09,849 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:10,175 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 21:56:10,543 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:10,836 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 21:56:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:10,869 INFO L93 Difference]: Finished difference Result 853 states and 2203 transitions. [2021-03-10 21:56:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:56:10,873 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 [2021-03-10 21:56:10,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:10,874 INFO L225 Difference]: With dead ends: 853 [2021-03-10 21:56:10,874 INFO L226 Difference]: Without dead ends: 853 [2021-03-10 21:56:10,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2942.7ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:56:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-03-10 21:56:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 756. [2021-03-10 21:56:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.7059602649006624) internal successors, (2043), 755 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2043 transitions. [2021-03-10 21:56:10,884 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2043 transitions. Word has length 17 [2021-03-10 21:56:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:10,884 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 2043 transitions. [2021-03-10 21:56:10,884 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) [2021-03-10 21:56:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2043 transitions. [2021-03-10 21:56:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:10,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:10,885 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:11,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2184,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:11,086 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1651396416, now seen corresponding path program 327 times [2021-03-10 21:56:11,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:11,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498310432] [2021-03-10 21:56:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:11,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498310432] [2021-03-10 21:56:11,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744223211] [2021-03-10 21:56:11,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:11,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:56:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:56:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:12,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,546 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 [2021-03-10 21:56:12,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:56:12,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,673 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2021-03-10 21:56:12,675 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:56:12,675 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:12,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,678 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:56:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:12,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:12,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:12,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455313564] [2021-03-10 21:56:12,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:12,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:12,845 INFO L87 Difference]: Start difference. First operand 756 states and 2043 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) [2021-03-10 21:56:13,455 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:56:14,128 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:56:14,753 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 21:56:16,208 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:56:16,840 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:56:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:17,273 INFO L93 Difference]: Finished difference Result 930 states and 2344 transitions. [2021-03-10 21:56:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:56:17,279 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 [2021-03-10 21:56:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:17,280 INFO L225 Difference]: With dead ends: 930 [2021-03-10 21:56:17,280 INFO L226 Difference]: Without dead ends: 930 [2021-03-10 21:56:17,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3931.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:56:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-03-10 21:56:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 758. [2021-03-10 21:56:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.7093791281373845) internal successors, (2051), 757 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2051 transitions. [2021-03-10 21:56:17,291 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2051 transitions. Word has length 17 [2021-03-10 21:56:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:17,291 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2051 transitions. [2021-03-10 21:56:17,291 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) [2021-03-10 21:56:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2051 transitions. [2021-03-10 21:56:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:17,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:17,292 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:17,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-03-10 21:56:17,493 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash 161991420, now seen corresponding path program 328 times [2021-03-10 21:56:17,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:17,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815087169] [2021-03-10 21:56:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815087169] [2021-03-10 21:56:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925665750] [2021-03-10 21:56:18,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:18,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:18,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:56:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:56:18,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,914 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 15 treesize of output 11 [2021-03-10 21:56:18,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:19,027 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2021-03-10 21:56:19,029 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:56:19,029 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:19,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:19,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:56:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:19,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:19,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:19,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065074929] [2021-03-10 21:56:19,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:19,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:19,207 INFO L87 Difference]: Start difference. First operand 758 states and 2051 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) [2021-03-10 21:56:20,593 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 21:56:21,243 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 21:56:21,703 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:56:22,006 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 21:56:22,436 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 21:56:22,859 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:56:23,660 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:56:23,879 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 21:56:24,184 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:56:24,591 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 21:56:24,933 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 21:56:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:25,746 INFO L93 Difference]: Finished difference Result 918 states and 2341 transitions. [2021-03-10 21:56:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:56:25,752 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 [2021-03-10 21:56:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:25,753 INFO L225 Difference]: With dead ends: 918 [2021-03-10 21:56:25,753 INFO L226 Difference]: Without dead ends: 918 [2021-03-10 21:56:25,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 5377.8ms TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:56:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-03-10 21:56:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 743. [2021-03-10 21:56:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.6954177897574123) internal successors, (2000), 742 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) [2021-03-10 21:56:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2000 transitions. [2021-03-10 21:56:25,763 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2000 transitions. Word has length 17 [2021-03-10 21:56:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:25,763 INFO L480 AbstractCegarLoop]: Abstraction has 743 states and 2000 transitions. [2021-03-10 21:56:25,763 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) [2021-03-10 21:56:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2000 transitions. [2021-03-10 21:56:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:25,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:25,764 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:25,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2190 [2021-03-10 21:56:25,964 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:25,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1235076800, now seen corresponding path program 329 times [2021-03-10 21:56:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:25,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547040983] [2021-03-10 21:56:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:26,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547040983] [2021-03-10 21:56:26,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156442232] [2021-03-10 21:56:26,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:26,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:56:26,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:56:26,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:27,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:27,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:27,314 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 [2021-03-10 21:56:27,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:27,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:27,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:56:27,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:27,443 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2021-03-10 21:56:27,445 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-03-10 21:56:27,445 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:27,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:27,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-03-10 21:56:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:27,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:27,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:27,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113715373] [2021-03-10 21:56:27,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:27,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:27,622 INFO L87 Difference]: Start difference. First operand 743 states and 2000 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) [2021-03-10 21:56:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:28,797 INFO L93 Difference]: Finished difference Result 800 states and 2104 transitions. [2021-03-10 21:56:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:56:28,802 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 [2021-03-10 21:56:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:28,803 INFO L225 Difference]: With dead ends: 800 [2021-03-10 21:56:28,803 INFO L226 Difference]: Without dead ends: 800 [2021-03-10 21:56:28,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1240.8ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-03-10 21:56:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 738. [2021-03-10 21:56:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.698778833107191) internal successors, (1989), 737 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1989 transitions. [2021-03-10 21:56:28,812 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1989 transitions. Word has length 17 [2021-03-10 21:56:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:28,812 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 1989 transitions. [2021-03-10 21:56:28,812 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) [2021-03-10 21:56:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1989 transitions. [2021-03-10 21:56:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:56:28,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:28,814 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:29,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:29,014 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:29,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1502419942, now seen corresponding path program 330 times [2021-03-10 21:56:29,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:29,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175246304] [2021-03-10 21:56:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:29,570 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:56:29,842 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-03-10 21:56:30,154 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-10 21:56:30,493 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-03-10 21:56:30,840 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 21:56:31,204 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-03-10 21:56:31,599 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 11 [2021-03-10 21:56:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:31,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175246304] [2021-03-10 21:56:31,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588446091] [2021-03-10 21:56:31,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:31,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:56:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:31,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:56:31,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:31,936 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:56:32,223 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:56:32,529 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:56:33,937 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 63 [2021-03-10 21:56:34,448 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 21:56:34,996 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 21:56:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:35,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:35,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:35,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-03-10 21:56:35,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,402 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 7 [2021-03-10 21:56:35,403 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-03-10 21:56:35,403 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:56:35,403 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:35,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_189 vanished before elimination [2021-03-10 21:56:35,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-03-10 21:56:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:35,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:35,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 21:56:35,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608327609] [2021-03-10 21:56:35,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:56:35,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:56:35,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:35,590 INFO L87 Difference]: Start difference. First operand 738 states and 1989 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:36,323 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:56:36,887 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:56:37,147 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:56:37,619 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:56:38,022 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:56:38,387 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:56:39,425 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-10 21:56:39,871 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:56:40,220 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:56:41,313 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-03-10 21:56:41,893 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:56:42,966 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-03-10 21:56:43,464 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:56:44,421 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-03-10 21:56:45,272 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 21:56:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:45,736 INFO L93 Difference]: Finished difference Result 1182 states and 3148 transitions. [2021-03-10 21:56:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:56:45,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:56:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:45,740 INFO L225 Difference]: With dead ends: 1182 [2021-03-10 21:56:45,740 INFO L226 Difference]: Without dead ends: 1179 [2021-03-10 21:56:45,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 11901.8ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:56:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-03-10 21:56:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 750. [2021-03-10 21:56:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.6942590120160212) internal successors, (2018), 749 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2018 transitions. [2021-03-10 21:56:45,748 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2018 transitions. Word has length 18 [2021-03-10 21:56:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:45,748 INFO L480 AbstractCegarLoop]: Abstraction has 750 states and 2018 transitions. [2021-03-10 21:56:45,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2018 transitions. [2021-03-10 21:56:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:56:45,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:45,749 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:45,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:45,949 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash 734866218, now seen corresponding path program 331 times [2021-03-10 21:56:45,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:45,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704081562] [2021-03-10 21:56:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:46,471 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 21:56:46,677 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:46,886 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:47,100 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 21:56:47,862 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-03-10 21:56:48,509 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-10 21:56:48,963 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:56:49,274 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 21:56:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:49,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704081562] [2021-03-10 21:56:49,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216941860] [2021-03-10 21:56:49,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:49,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:56:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:49,612 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:56:49,902 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:56:50,290 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:56:50,623 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:56:51,248 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 21:56:51,922 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 21:56:52,804 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 21:56:53,244 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 21:56:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-03-10 21:56:53,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:53,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-03-10 21:56:53,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:56:53,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-03-10 21:56:53,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:53,915 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-03-10 21:56:53,915 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:56:53,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:53,918 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-03-10 21:56:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:54,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:54,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:56:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221923124] [2021-03-10 21:56:54,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:56:54,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:54,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:56:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:56:54,115 INFO L87 Difference]: Start difference. First operand 750 states and 2018 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:54,472 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 21:56:55,077 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 21:56:55,730 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 21:56:56,350 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 21:56:56,810 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 21:56:57,619 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 21:56:58,150 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 21:56:59,161 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-03-10 21:56:59,888 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:57:00,511 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 21:57:00,950 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 21:57:01,680 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 21:57:02,769 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-03-10 21:57:03,345 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 21:57:04,344 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-10 21:57:05,488 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-03-10 21:57:06,698 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2021-03-10 21:57:06,997 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-10 21:57:08,255 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-03-10 21:57:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:08,944 INFO L93 Difference]: Finished difference Result 1014 states and 2602 transitions. [2021-03-10 21:57:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:57:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:57:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:08,951 INFO L225 Difference]: With dead ends: 1014 [2021-03-10 21:57:08,951 INFO L226 Difference]: Without dead ends: 1006 [2021-03-10 21:57:08,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 17721.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:57:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-03-10 21:57:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 798. [2021-03-10 21:57:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 2.707653701380176) internal successors, (2158), 797 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2158 transitions. [2021-03-10 21:57:08,962 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2158 transitions. Word has length 18 [2021-03-10 21:57:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:08,962 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 2158 transitions. [2021-03-10 21:57:08,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2158 transitions. [2021-03-10 21:57:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:57:08,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:08,963 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:09,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2213,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:09,164 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash 742596616, now seen corresponding path program 332 times [2021-03-10 21:57:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:09,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528145701] [2021-03-10 21:57:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:10,173 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 21:57:10,444 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 21:57:10,709 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 21:57:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528145701] [2021-03-10 21:57:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564661614] [2021-03-10 21:57:10,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:10,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:10,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:10,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:57:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:11,017 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:57:11,253 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:57:11,497 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:57:11,761 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:57:12,318 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 21:57:12,850 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 21:57:13,641 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 21:57:14,200 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 21:57:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:14,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:14,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-03-10 21:57:14,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:14,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:14,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-03-10 21:57:14,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:14,636 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-03-10 21:57:14,636 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-03-10 21:57:14,636 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:57:14,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:57:14,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:14,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-03-10 21:57:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:14,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:14,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 21:57:14,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089525353] [2021-03-10 21:57:14,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:57:14,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:14,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:57:14,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:14,735 INFO L87 Difference]: Start difference. First operand 798 states and 2158 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:15,009 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 21:57:15,886 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:57:16,619 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 21:57:17,364 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 21:57:18,048 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 21:57:18,759 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 21:57:19,594 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-10 21:57:20,391 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 21:57:20,965 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 21:57:21,576 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 21:57:22,583 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:57:23,668 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-10 21:57:24,599 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-03-10 21:57:25,314 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 21:57:25,971 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:57:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:26,404 INFO L93 Difference]: Finished difference Result 1017 states and 2630 transitions. [2021-03-10 21:57:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:57:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:57:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:26,410 INFO L225 Difference]: With dead ends: 1017 [2021-03-10 21:57:26,410 INFO L226 Difference]: Without dead ends: 1007 [2021-03-10 21:57:26,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 13119.2ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:57:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-03-10 21:57:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 801. [2021-03-10 21:57:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 2.70375) internal successors, (2163), 800 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2163 transitions. [2021-03-10 21:57:26,421 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2163 transitions. Word has length 18 [2021-03-10 21:57:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:26,421 INFO L480 AbstractCegarLoop]: Abstraction has 801 states and 2163 transitions. [2021-03-10 21:57:26,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2163 transitions. [2021-03-10 21:57:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:57:26,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:26,422 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:26,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-03-10 21:57:26,622 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:26,622 INFO L82 PathProgramCache]: Analyzing trace with hash -746808380, now seen corresponding path program 333 times [2021-03-10 21:57:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:26,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134566321] [2021-03-10 21:57:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:27,490 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 21:57:27,836 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-10 21:57:28,042 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2021-03-10 21:57:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134566321] [2021-03-10 21:57:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855429645] [2021-03-10 21:57:28,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:28,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:57:28,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:28,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:57:28,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:28,330 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:57:28,661 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:57:28,926 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:57:29,458 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 21:57:29,995 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 21:57:30,268 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:57:30,754 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 21:57:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:30,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:31,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:31,093 INFO L244 Elim1Store]: Index analysis took 107 ms [2021-03-10 21:57:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-03-10 21:57:31,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:31,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:31,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-03-10 21:57:31,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:31,277 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-03-10 21:57:31,277 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:57:31,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_195 vanished before elimination [2021-03-10 21:57:31,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-03-10 21:57:31,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:31,281 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-03-10 21:57:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:31,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:31,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:57:31,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249745060] [2021-03-10 21:57:31,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:57:31,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:31,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:57:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:31,465 INFO L87 Difference]: Start difference. First operand 801 states and 2163 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:32,376 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 21:57:33,087 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:57:33,368 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:57:33,989 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 21:57:34,531 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:57:35,291 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 21:57:35,646 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:57:36,215 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 21:57:36,793 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 21:57:37,352 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:57:37,931 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 21:57:38,736 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-03-10 21:57:39,563 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:57:40,118 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:57:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:40,558 INFO L93 Difference]: Finished difference Result 1012 states and 2640 transitions. [2021-03-10 21:57:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:57:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:57:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:40,564 INFO L225 Difference]: With dead ends: 1012 [2021-03-10 21:57:40,564 INFO L226 Difference]: Without dead ends: 1002 [2021-03-10 21:57:40,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 9617.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:57:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-03-10 21:57:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 817. [2021-03-10 21:57:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.7107843137254903) internal successors, (2212), 816 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2212 transitions. [2021-03-10 21:57:40,575 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2212 transitions. Word has length 18 [2021-03-10 21:57:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:40,575 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 2212 transitions. [2021-03-10 21:57:40,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2212 transitions. [2021-03-10 21:57:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:57:40,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:40,576 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:40,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2264,338 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:40,776 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 326277000, now seen corresponding path program 334 times [2021-03-10 21:57:40,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:40,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885106047] [2021-03-10 21:57:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:41,707 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:57:42,167 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:57:42,652 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:57:42,947 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-03-10 21:57:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885106047] [2021-03-10 21:57:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000471787] [2021-03-10 21:57:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:43,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:43,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:43,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:57:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:43,501 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:57:43,776 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:57:44,042 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:57:44,566 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 21:57:44,857 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:57:45,343 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 21:57:45,841 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 21:57:46,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:46,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:46,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-03-10 21:57:46,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:57:46,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-03-10 21:57:46,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,296 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-03-10 21:57:46,296 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:57:46,296 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-03-10 21:57:46,296 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-03-10 21:57:46,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-03-10 21:57:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:46,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:46,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 21:57:46,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18293724] [2021-03-10 21:57:46,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:57:46,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:46,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:57:46,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:46,501 INFO L87 Difference]: Start difference. First operand 817 states and 2212 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,585 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 21:57:48,389 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 21:57:48,713 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:57:49,423 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 Received shutdown request... [2021-03-10 21:57:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:57:49,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2283,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:49,705 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:57:49,709 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:57:49,709 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:57:49 BasicIcfg [2021-03-10 21:57:49,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:57:49,710 INFO L168 Benchmark]: Toolchain (without parser) took 875635.74 ms. Allocated memory was 255.9 MB in the beginning and 448.8 MB in the end (delta: 192.9 MB). Free memory was 236.4 MB in the beginning and 329.6 MB in the end (delta: -93.2 MB). Peak memory consumption was 101.3 MB. Max. memory is 16.0 GB. [2021-03-10 21:57:49,710 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 162.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:57:49,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.88 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: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:57:49,710 INFO L168 Benchmark]: Boogie Preprocessor took 13.37 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: 896.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:57:49,710 INFO L168 Benchmark]: RCFGBuilder took 302.43 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 233.2 MB in the end (delta: 323.2 kB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-10 21:57:49,710 INFO L168 Benchmark]: TraceAbstraction took 875292.99 ms. Allocated memory was 255.9 MB in the beginning and 448.8 MB in the end (delta: 192.9 MB). Free memory was 232.5 MB in the beginning and 329.6 MB in the end (delta: -97.2 MB). Peak memory consumption was 96.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:57:49,710 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 162.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.88 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: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.37 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: 896.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 302.43 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 233.2 MB in the end (delta: 323.2 kB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 875292.99 ms. Allocated memory was 255.9 MB in the beginning and 448.8 MB in the end (delta: 192.9 MB). Free memory was 232.5 MB in the beginning and 329.6 MB in the end (delta: -97.2 MB). Peak memory consumption was 96.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (817states) and FLOYD_HOARE automaton (currently 11 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (37 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: 875212.3ms, OverallIterations: 348, TraceHistogramMax: 4, EmptinessCheckTime: 178.1ms, AutomataDifference: 499487.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9235 SDtfs, 18834 SDslu, 64405 SDs, 0 SdLazy, 134050 SolverSat, 4637 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89237.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11685 GetRequests, 3343 SyntacticMatches, 376 SemanticMatches, 7966 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40887 ImplicationChecksByTransitivity, 474610.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=817occurred in iteration=347, InterpolantAutomatonStates: 6888, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1737.9ms AutomataMinimizationTime, 347 MinimizatonAttempts, 29369 StatesRemovedByMinimization, 347 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1138.6ms SsaConstructionTime, 3986.2ms SatisfiabilityAnalysisTime, 295165.1ms InterpolantComputationTime, 10796 NumberOfCodeBlocks, 10796 NumberOfCodeBlocksAsserted, 1151 NumberOfCheckSat, 10110 ConstructedInterpolants, 293 QuantifiedInterpolants, 131012 SizeOfPredicates, 2142 NumberOfNonLiveVariables, 25176 ConjunctsInSsa, 7712 ConjunctsInUnsatCore, 686 InterpolantComputations, 10 PerfectInterpolantSequences, 1380/8210 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